Marc Anthony, Chris Brown and LMFAO have been booked to perform at the 2011 American Music Awards show in Los Angeles, producers announced Tuesday. They join previously announced acts Christina Aguilera, Justin Bieber, Mary J. Blige, Kelly Clarkson, Katy Perry, Pitbull and Maroon 5. The American Music Awards show is described by producers as "a host-free event that highlights music's biggest artists performing on one stage." This year's event is to be broadcast live from the NOKIA Theatre L.A. LIVE Nov. 20.