Justin Bieber cleaned up at the American Music Awards on Sunday.
His wins included the show's top award, artist of the year. His mom joined him onstage as he collected the trophy, beating out Rihanna, Maroon 5, Katy Perry and Drake.
The 18-year-old also won the honor in 2010. He said it's "hard growing up with everyone watching me" and asked that people continue to believe in him.
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 buzzed-about 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."
Get the whole scoop here.
And see the "five biggest jaw droppers," according to E!