Minutes after Kendrick Lamar scored his fifth Grammy of the night for Best Rap Album, he won the stage. Performing a medley that included “Alright†and “The Blacker the Berry,†he approached the microphone chained to other black men in a makeshift prison block. What followed was a Biggie-invoking, glow-in-the-dark, Fela!-inspired event fit for Broadway. True to Kendrick’s lightning-rod stage presence, it ended with the debut of a searing new verse about modern slavery, in memory of Trayvon Martin: “On February 26th I lost my life, too.â€