Justin Bieber, Christina Aguilera Join 2011 AMA Performers

Justin Bieber, Christina Aguilera, Kelly Clarkson, Mary J. Blige and Maroon 5 have been added to the ever-expanding list of performers for the 2011 American Music Awards, joining a roster of talent that already includes Katy Perry and Pitbull.

While most of this year's performances are being kept under wraps, a spokesperson for Dick Clark Productions announced Monday (October 24) that Aguilera and Maroon 5 will team up on their current smash "Moves Like Jagger" at this year's AMAs, which will air live on ABC on November 20 at 8 p.m. ET/PT from the Nokia Theatre in Los Angeles.

Earlier this month, in a nomination special hosted by Pitbull and Nicki Minaj, it was revealed that Perry would head into the show as one of the night's most-nominated acts (along with fellow females Adele, Lady Gaga and Taylor Swift), up for Artist of the Year, Pop or Rock Music: Favorite Female Artist and Adult Contemporary Music: Favorite Artist. It's somewhat fitting, given not only the rather huge year she's had, but that she also delivered a full-throttle version of her hit "Firework" at last year's AMAs.

For the fifth year, American Music Award winners will be determined by online voting. Fans can support their favorites in all categories by heading over to AMAVote.com.

The 2011 American Music Awards will air live from the Nokia Theatre in Los Angeles on Sunday, November 20, at 8 p.m. ET/PT on ABC.