Every year at the Grammys, performances are one of the main reasons people tune in to watch the show -- besides seeing who takes home the awards, of course. On Wednesday, the Grammys announced via Twitter who some of the performers will be for this years show. Making the list are Taylor Swift, The Black Keys, Rihanna, .fun and Mumford and Sons. More performers will be announced leading up to the Feb. 10 show.