The American Music Awards were handed out on Sunday to the biggest stars around. Janet Jackson performed on stage, and her brother Michael won four awards.
But the big winner on the night was Taylor Swift, who took home five prizes, including artist of the year. She had to say thanks via satellite because she is in the UK.
It was big night for Rihanna, who performed a mix of tunes from her new album. It was the first public performance for the singer for a long time.
Green Day were named best alternative artist. Later lead singer Billie Joe Armstrong admitted to being a bit starstruck when backstage.
Black Eyed Peas were voted favorite pop/rock band. They got the crown going with a performance of two of their songs, I Got A Feeling and Boom Boom Pow.
It wouldn't be an awards show without a performance from Lady GaGa, and yes her piano is on fire. Don't try this at home - it's dangerous and your parents will be cross.
Leona Lewis made sure at least some British acts got a look in. The lady with her is Carrie Ann Inaba - she's a judge on the American version of Strictly Come Dancing.
Jennifer Lopez reminded everyone of her musical talents too. Sadly for the singer she took a tumble mid dance routine.
Jay-Z performed with Alicia Keyes and even though they were in Los Angeles the pair blasted out their tune about New York, Empire State of Mind.
Shakira didn't have a pal to sing with, but at least made sure she wasn't left dancing on her own to her new single.
Back on the red carpet former American Idol judge Paula Abdul also brought some friends. We're not sure exactly what they all do, but they look important don't they?
Disney's Camp Rock star Demi Lovato told journalists she was looking forward to watching Whitney Houston and Rihanna perform.
Another Disney star, Selena Gomez, was also looking forward to seeing some big stars sing, and like Demi wanted to watch Rihanna the most.