Celebrities perform at 2011 American Music Awards

Updated: 2011-11-21 15:01

(Agencies)

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Celebrities perform at 2011 American Music Awards

Singer SkyBlue of LMFAO and Justin Bieber (R) perform "Party Rock Anthem" at the 2011 American Music Awards in Los Angeles November 20, 2011.[Photo/Agencies]

Celebrities perform at 2011 American Music Awards

Singer Katy Perry performs with a guitar at the 2011 American Music Awards in Los Angeles November 20, 2011.[Photo/Agencies]