Justin Bieber, right, and Nicki Minaj perform at the 40th Anniversary American 

Justin Bieber, right, and Nicki Minaj perform at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Associated Press
Justin Bieber, right, and Nicki Minaj perform at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
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