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The 40th American Music Awards - Show

LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera performs onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

American Music Awards

November 19, 2012

Canadian pop superstar Justin Bieber was one of the big winners at Sunday night's American Music Awards, where he took home 'Artist of the Year.'