America proved its Bieber Fever was strong: The teen singer dominated the American Music Awards on Sunday night.
Justin Bieber's wins included the show's top award, artist of the year. His mom, Pattie Malette, joined him onstage as he collected the trophy, beating out Rihanna, Maroon 5, Katy Perry and Drake.
"I wanted to thank you for always believing in me," Bieber said, looking to his mom.
Bieber and Nicki Minaj performed together -- and separately -- at the AMAs and were both multiple winners.
But another collaboration was the night's most colorful performance: Korean rapper PSY and MC Hammer. Hammer joined the pop star for his viral hit "Gangnam Style." PSY rocked traditional "Hammer" pants as they danced to his jam and to Hammer's "Too Legit to Quit."
Bieber won favorite pop/rock male artist in the show's first award and gave a shout-out to those who didn't think he would last on the music scene.
"I want to say this is for all the haters who thought I was just here for one or two years. I feel like I'm going to be here for a very long time," he said.
Minaj, who wore three different wigs and four outfits throughout the night, repeated her AMA wins from last year, picking up trophies for favorite rap/hip-hop artists and album for "Pink Friday: Roman Reloaded."
As Bieber won his second award, he was kissed on the neck by Jenny McCarthy, who presented the award.
Bieber's red and black outfit seemed to be the night's theme, as Taylor Swift and Usher wore similar ensembles.
Usher kicked off the three-hour show with green laser lights beaming onstage as he performed a medley of songs. He won favorite soul/R&B male artist.
Dick Clark, who created the AMAs, was remembered by Ryan Seacrest and an upbeat performance by Stevie Wonder.
Carly Rae Jepsen, who performed early in the night, won favorite new artist.
American Music Awards nominees were selected based on sales and airplay, and fans chose the winners by voting online.