Justin Bieber Pictures: Justin Bieber arrives on the red carpet at the 40th Anniversary American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California.

Produced by Larry Klein and executive producers Orly Adelson and Barry Adelman of Dick Clark Productions, Inc., the American Music Awards once again featured a star-studded line-up of the music industry's top artists and performances, while celebrating 40 years of AMA history and memorable moments. The 40th Anniversary American Music Awards honored artists in the categories of Pop/Rock, Country, Rap/Hip-Hop, Soul/R&B, Alternative, Adult Contemporary, Latin and Contemporary Inspirational. For the sixth year, fans determined the winners by online voting.

Photo credit: Andrew Evans / PR Photos