Now that Baby Boomer favorite Celine Dion is on maternity leave, “old friend†Will Ferrell has decided to help out and do her Vegas show while she recovers with her new twins. Ferrell, who is making a habit of singing on The Late Show, gave Letterman a sneak-peek at what things will look like at Caesars when he takes over with a chest-thumping rendition of “The Power Of Love.†Next up, Chelsea Handler doesn’t have to remind Nick Swardson that the idea of that his character dating Jennifer Aniston’s character in their new movie Just Go With It is ridiculous, but she does anyway, and wrapping things up on Jimmy Kimmel Live, Mandy Moore admits that she has to tolerate husband Ryan Adams’ love of death metal, but thinks he’s lying when he says it influences his own music. Watch our compilation to see what you missed.