Justin Bieber took home Artist of the Year at the American Music Awards on Sunday night, a big win on a night that opened with another victory for the teen star. It was one exuberant moment among many at the AMAs, which were celebrating their 40th anniversary with the Nokia Live event in Los Angeles. Other big winners included Nicki Minaj, Taylor Swift, Usher, Katy Perry, Beyonce, Shakira, TobyMac and others.
