Rihanna! Taylor Swift! Mumford & Sons! The Black Keys! fun. (More performers will be announced; don't give up on Frank Ocean just yet.) LL Cool J is your host, so expect another T-Swizzle beatbox, or at least some extravagant reenactment of the Virgin Islands Fight with a functional boat and Mick Jagger astronauts sporting twelve nipples. The not-at-all-predictable magic goes down February 10.