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Rihanna What: Gown by Commes des Garcons; jewels by Le Vian and DVANI Photo: Neilson Barnard/Getty Images
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Katy Perry What: Gown Maison Margiela 'Artisanal' custom by John Galliano
Photo: John Shearer/Getty Images
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Kim Kardashian What: Gown by Vivienne Westwood Photo: Kevin Mazur/WireImage
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Claire Danes What: Look by Monse Photo: Neilson Barnard/Getty Images
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Dakota Johnson What: Gown by Gucci Photo: Neilson Barnard/Getty Images
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Mandy Moore What: Gown Michael Kors Collection
Photo: Kevin Mazur/WireImage
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Rick Owens, Michèle Lamy Photo: Venturelli/WireImage
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Evan Rachel Wood What: Gown by Altuzarra Photo: Jamie McCarthy/FilmMagic
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Gigi Hadid What: Gown by Tommy Hilfiger Photo: Neilson Barnard/Getty Images
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Natalia Vodianova What: Gown by Diane von Furstenberg
Photo: ANGELA WEISS/AFP/Getty Images
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Miranda Kerr What: Gown by Oscar de la Renta Photo: Neilson Barnard/Getty Images
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Donna Karan Photo: Jamie McCarthy/FilmMagic
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Julianne Moore What: Calvin Klein by Appointment gown Photo: John Shearer/Getty Images
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Grimes What: Gown by Proenza Schouler Photo: Neilson Barnard/Getty Images
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Naomi Campbell, Edward Enninful Photo: Neilson Barnard/Getty Images
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Janelle Monae What: Jewels by Tiffany & Co. Photo: Jamie McCarthy/FilmMagic
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Ruby Rose Photo: John Shearer/Getty Images
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Lil Yachty Photo: George Pimentel/WireImage
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Zoe Kravitz What: Gown by Oscar de la Renta Photo: Neilson Barnard/Getty Images
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Pharrell Williams, Helen Lasichanh What: Both in Commes des Garcons Photo: John Shearer/Getty Images
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Priyanka Chopra What: Custom Ralph Lauren Collection ; jewels by Jennifer Fisher Photo: John Shearer/Getty Images
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Lupita Nyong'o What: Gown by Prada; jewels by Tiffany & Co.
Photo: Neilson Barnard/Getty Images
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Nicki Minaj What: Gown by H&M Photo: Neilson Barnard/Getty Images
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Jaden Smith What: Tuxedo by Louis Vuitton Photo: Neilson Barnard/Getty Images
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Lily Collins What: Gown Giambattista Valli Couture; jewels by Tiffany & Co.
Photo: Neilson Barnard/Getty Images
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Michelle Monaghan What: Gown by Paco Rabanne Photo: Dia Dipasupil/Getty Images For Entertainment W
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Halle Berry What: Atelier Versace jumpsuit; jewels atelier Swarovski
Photo: Neilson Barnard/Getty Images
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Sofia Coppola What: Gown by Marc Jacobs Photo: George Pimentel/WireImage
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Zendaya What: Gown by Dolce & Gabbana Alta Moda; shoes by Jimmy Choo
Photo: John Shearer/Getty Images
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Lily-Rose Depp What: Gown Chanel Haute Couture Photo: John Shearer/Getty Images
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Sofía Sanchez Barrenechea Photo: Venturelli/WireImage
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Bobby Cannavale, Rose Byrne What: Rose wears gown by Ralph Lauren; clutch Edie Parker Photo: John Shearer/Getty Images
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Gwyneth Paltrow What: Gown Calvin Klein By Appointment Photo: Dia Dipasupil/Getty Images For Entertainment W
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Claire Foy What: Gown by Erdem Photo: Venturelli/WireImage
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Chrissy Teigen What: Gown by Marchesa Photo: Neilson Barnard/Getty Images
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Kate Hudson What: Gown by Stella McCartney Photo: John Shearer/Getty Images
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Madonna What: Gown by Moschino Photo: Neilson Barnard/Getty Images
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Maggie Gyllenhaal What: Gown by Marni Photo: Neilson Barnard/Getty Images
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Naomi Watts What: Gown by Stella McCartney Photo: John Shearer/Getty Images
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Hailey Baldwin What: Gown by Carolina Herrera; veil by Gigi Burris Millinery
Photo: John Shearer/Getty Images
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Kate Bosworth What: Custom gown by Tory Burch Photo: John Shearer/Getty Images
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Celine Dion What: Gown by Versace Photo: John Shearer/Getty Images
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Zoey Deutch What: Custom gown by Tory Burch
Photo: Dimitrios Kambouris/Getty Images
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Bella Hadid What: Jumpsuit by Alexander Wang Photo: John Shearer/Getty Images
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Cara Delevingne What: Suit by Chanel Photo: John Shearer/Getty Images
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Haley Bennett What: Gown by Dolce & Gabbana Alta Moda Photo: Neilson Barnard/Getty Images
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Karlie Kloss What: Dress by Carolina Herrera Photo: Neilson Barnard/Getty Images
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Jennifer Lopez What: Gown by Valentino Photo: Neilson Barnard/Getty Images
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Emmy Rossum What: Gown by Carolina Herrera
Photo: Neilson Barnard/Getty Images
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Kylie Jenner What: Gown by Versace Photo: Neilson Barnard/Getty Images
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Mary J. Blige What: Dress by La Perla
Photo: Neilson Barnard/Getty Images
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Paris Jackson What: Gown Calvin Klein By Appointment; jewels by Tiffany & Co.
Photo: Neilson Barnard/Getty Images
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Amy Schumer What: Gown by Zac Posen Photo: Neilson Barnard/Getty Images
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Reese Witherspoon What: Gown by Mugler; jewels by Tiffany & Co. Photo: Neilson Barnard/Getty Images
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Donald Glover What: Suit by Burberry Photo: Neilson Barnard/Getty Images
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Serena Williams What: Gown by Versace Photo: Dia Dipasupil/Getty Images For Entertainment W
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Blake Lively What: Gown by Atelier Versace Photo: Dimitrios Kambouris/Getty Images
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Yolanda Hadid Photo: Dimitrios Kambouris/Getty Images
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Jemima Kirke Photo: Jamie McCarthy/FilmMagic
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Taylor Hill What: Gown by Carolina Herrera; jewels by David Yurman Photo: Jamie McCarthy/FilmMagic
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Tom Brady, Gisele Bundchen What: Tom wears Tom Ford, Gisele wears Stella McCartney
Photo: Neilson Barnard/Getty Images
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Lily James What: Gown by Burberry Photo: Theo Wargo/Getty Images For US Weekly
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Rita Ora What: Marchesa costum Couture Photo: John Shearer/Getty Images
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Sarah Paulson What: Gown by Prada; jewels by Irene Neuwirth
Photo: Neilson Barnard/Getty Images
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Jourdan Dunn, Future What: Jourdan wears clutch by Edie Parker
Photo: Dimitrios Kambouris/Getty Images
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Lena Dunham What: Gown custom Elizabeth Kennedy Photo: Dimitrios Kambouris/Getty Images
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Léa Seydoux What: Gown by Louis Vuitton Photo: Dia Dipasupil/Getty Images For Entertainment W
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Ruth Negga What: Gown by Louis Vuitton Photo: Ben Gabbe/Getty Images for The Mark Hotel
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Liu Wen What: Gown by Off-White Photo: Neilson Barnard/Getty Images
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Kendall Jenner What: Gown by La Perla Haute Couture Photo: Neilson Barnard/Getty Images
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Candice Swanepoel What: Custom Topshop Gown Photo: Neilson Barnard/Getty Images
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Jennifer Connelly What: Dress by Louis Vuitton Photo: Dia Dipasupil/Getty Images For Entertainment W
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Ashley Graham Photo: Neilson Barnard/Getty Images
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Elle Fanning What: Gown by Miu Miu Photo: Neilson Barnard/Getty Images
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Diane Kruger What: Gown by Diane von Furstenberg
Photo: Neilson Barnard/Getty Images
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Stacy Martin Photo: Neilson Barnard/Getty Images
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Lara Stone What: Gown by Christopher Kane Photo: Dimitrios Kambouris/Getty Images
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Sasha Lane What: Custom H&M Gown Photo: Neilson Barnard/Getty Images
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Mary-Kate Olsen, Ashley Olsen Photo: Neilson Barnard/Getty Images
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Maxwell Photo: Theo Wargo/Getty Images For US Weekly
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Jessica Chastain What: Gown by Prada Photo: Neilson Barnard/Getty Images
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Hailee Steinfeld What: Gown by Vera Wang Photo: Dimitrios Kambouris/Getty Images
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Felicity Jones What: Gown by Erdem Photo: Dimitrios Kambouris/Getty Images
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Riley Keough What: Gown by Louis Vuitton Photo: Dimitrios Kambouris/Getty Images
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The Weeknd Photo: John Shearer/Getty Images
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Selena Gomez What: Gown by Coach; jewels by Tiffany & Co. Photo: John Shearer/Getty Images
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Luciana Barroso, Matt Damon Photo: Neilson Barnard/Getty Images
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Leslie Mann Photo: Neilson Barnard/Getty Images
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Karen Elson What: Gown by Zac Posen; jewels by Tiffany & Co. Photo: Neilson Barnard/Getty Images
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Hugh Jackman, Deborra-Lee Furness Photo: Neilson Barnard/Getty Images
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Joe Jonas What: Suit by H&M Photo: Neilson Barnard/Getty Images
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Cynthia Erivo What: Gown by Thom Browne; jewels by Mikimoto Photo: Jamie McCarthy/FilmMagic
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Courtney Love What: Dress by Marc Jacobs; clutch by Tyler Ellis; jewels by L’Dezen by Payal Shah Photo: Kevin Mazur/WireImage
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Frances Bean Cobain What: Gown by Marc Jacobs; jewels by Lydia Courteille
Photo: Kevin Mazur/WireImage
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Thandie Newton What: Gown by Monse Photo: Neilson Barnard/Getty Images
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Huma Abedin What: Gown by Johanna Ortiz
Photo: Neilson Barnard/Getty Images
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Keri Russell What: Custom rag & bone; jewels by David Webb
Photo: Dimitrios Kambouris/Getty Images
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Cassie, Sean 'Diddy' Combs What: Cassie wears gown by On Aura Tout Vu, Diddy wears tuxedo by Rick Owens Photo: Neilson Barnard/Getty Images
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Corey Hawkins What: Tuxedo by Todd Snyder. Photo: Jamie McCarthy/FilmMagic
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Kerry Washington What: Gown by Michael Kors Photo: Jamie McCarthy/FilmMagic
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Andrew Rannells Photo: Dimitrios Kambouris/Getty Images
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Wiz Khalifa Photo: Neilson Barnard/Getty Images
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Lily Aldridge What: Custom Ralph Lauren Collection Photo: Neilson Barnard/Getty Images
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Adriana Lima What: Gown by Alberta Ferretti Photo: Neilson Barnard/Getty Images
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Anna Cleveland What: Clutch by M2MALLETIER Photo: Sean Zanni/Patrick McMullan via Getty Image
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Solange Knowles What: Dress by Thom Browne Photo: Neilson Barnard/Getty Images
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Hannah Bagshawe, Eddie Redmayne What: Eddie wears tuxedo by Prada Photo: Neilson Barnard/Getty Images
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Alexander Skarsgard What: Tuxedo by Ermenegildo Zegna Couture Photo: Sean Zanni/Patrick McMullan via Getty Image
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Salma Hayek Photo: Neilson Barnard/Getty Images
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Michael B. Jordan Photo: Dia Dipasupil/Getty Images For Entertainment W
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Stella Maxwell Photo: Neilson Barnard/Getty Images
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Sophie Turner What: Gown by Louis Vuitton Photo: Dimitrios Kambouris/Getty Images
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Emily Ratajkowski What: Gown by Marc Jacobs Photo: Neilson Barnard/Getty Images
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Amy Fine Collins Photo: Dia Dipasupil/Getty Images For Entertainment W
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Trevor Noah What: Tuxedo by Ermenegildo Zegna Couture
Photo: Neilson Barnard/Getty Images
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Dree Hemingway What: Gown by Diane von Furstenberg
Photo: Neilson Barnard/Getty Images
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Tracee Ellis Ross What: Dress by Comme Des Garçons; clutch by Edie Parker Photo: Neilson Barnard/Getty Images
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Grace Hartzel What: Gown Dior Haute Couture Photo: Neilson Barnard/Getty Images
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Elizabeth Banks What: Gown custom Michael Kors Photo: John Shearer/Getty Images
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Mindy Kaling What: Gown by Prabal Gurung; jewels by Jacob & Co. Photo: Neilson Barnard/Getty Images
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Katie Holmes What: Gown by Zac Posen Photo: Neilson Barnard/Getty Images
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Diplo What: Tuxedo by Thom Browne Photo: John Shearer/Getty Images
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Tommy Hilfiger, Dee Hilfiger Photo: Kevin Mazur/WireImage
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Diane von Furstenberg Photo: Dimitrios Kambouris/Getty Images
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Carla Sozzani Photo: Venturelli/WireImage
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Nick Jonas Photo: Dia Dipasupil/Getty Images For Entertainment W
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Alexa Chung What: Gown by Diane von Furstenberg Photo: Neilson Barnard/Getty Images
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Lauren Bush Photo: Kevin Mazur/WireImage
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Laura Dern What: Gown by Gabriela Hearst Photo: Neilson Barnard/Getty Images
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Laura Osnes Photo: John Shearer/Getty Images
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Aymeline Valade What: Suit by Marni Photo: Neilson Barnard/Getty Images
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Rila Fukushima What: Gown by Louis Vuitton Photo: Neilson Barnard/Getty Images
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Daria Strokous What: Gown Dior Haute Couture Photo: Neilson Barnard/Getty Images
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Joan Smalls Where: Custom Topshop Gown Photo: Dia Dipasupil/Getty Images For Entertainment W
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La La Anthony What: Gown custom Thai Nguyen Atelier Photo: Neilson Barnard/Getty Images
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Sofia Richie What: Custom Topshop Gown Photo: Dia Dipasupil/Getty Images For Entertainment W
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Behati Prinsloo What: Custom Topshop Gown Photo: Neilson Barnard/Getty Images
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Anna Wintour What: Gown by Chanel Photo: Neilson Barnard/Getty Images
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Bee Shaffer What: Gown by Alexander McQueen Photo: Neilson Barnard/Getty Images
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Wendi Deng Murdoch What: Jewels by Cindy Chao
Photo: Neilson Barnard/Getty Images
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Ansel Elgort What: Watch by Tiffany & Co. Photo: Neilson Barnard/Getty Images
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Lisa Love Photo: Venturelli/WireImage
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Daisy Ridley What: Gown by Oscar de la Renta; jewels by NIRAV MODI Photo: John Shearer/Getty Images
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Presley Walker Gerber What: Tuxedo by Topshop Photo: Dimitrios Kambouris/Getty Images
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Nick Kroll What: Tuxedo by Luigi Bianchi Photo: Neilson Barnard/Getty Images
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Megyn Kelly What: Gown by Altuzarra Photo: Neilson Barnard/Getty Images
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Aziz Ansari What: Tuxedo by Ermenegildo Zegna Couture Photo: Neilson Barnard/Getty Images