Grammy performer rollout begins

AND SO IT BEGINS: The first batch of Grammy performers have been announced by the Recording Academy, and they’re precisely the acts everyone expected to carry the show, with dozens of noms among them. We’re referring, of course, to The Black Keys, fun. (or FUN., as the Academy styles it), Mumford & Sons, Rihanna, and Taylor Swift. For the umpteenth time, the Grammy Awards will air on Sunday, Feb. 10, from Staples Center. (1/9a)