The first round of performers announced for the 2013 Grammys include Taylor Swift, Mumford & Sons, fun., Rihanna and the Black Keys. The ceremony (airing Feb. 10 on CBS) will mark the first time either fun. or the Black Keys have performed on the Grammys stage. Swift, Mumford & Sons, and Rihanna are all veterans of the broadcast.
Each act was ostensibly chosen based on the amount of nominations they garnered. That doesn't really explain Frank Ocean, Jay-Z, and Kanye West's respective absences from the roster so far, but more performers are expected to be announced soon.