งานประกาศรางวัล American Music Award ปี 2012

Justin Bieber accepts the award for artist of the year as his mom Pattie Malette looks on at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Stevie Wonder and the Rickey Minor Band perform a tribute to Dick Clark at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Stevie Wonder and the Rickey Minor Band perform “Master Blaster”, “My Cherie Amour” and “Sir Duke” as a tribute to Dick Clark at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Psy performs at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

MC Hammer, left, dances as PSY performs “Gangnam Style” at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Carrie Underwood performs at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Lady Antebellum accepts the award for favorite band, duo or group - country at the 40th Anniversary American Music Awards on Nov. 18, 2012

Christina Aguilera, left, and Pitbull perform at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Nicki Minaj accepts the award for favorite artist - rap/hip-hop at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Carly Rae Jepsen poses backstage with the Old Navy new artist of the year award at the 40th Anniversary American Music Awards on Nov. 18, 2012, in Los Angeles.

Justin Bieber accepts the award for favorite male artist - pop/rock at the 40th Annual American Music Awards Nov. 18, 2012, in Los Angeles.