Billie Eilish wins big at American Music Awards

The red carpet was out in the US city of Las Vegas, where this year's American Music Awards (AMAs) took place.

The biggest prize of the night went to Billie Eilish, who picked up album of the year.

She beat the likes of Taylor Swift, Sabrina Carpenter and Gracie Abrams to scoop the award.

In fact, it was a huge night for Eilish, who won all seven of the categories in which she was nominated.

Keep reading to find out who else were the big winners at the AMAs.

Who won at the AMAs?

Gracie Abrams picked up the award for new artist of the year

Billie Eilish had a night to remember as she picked up seven prizes at the fan-voted awards show.

Eilish won artist of the year, as well as album of the year AND song of the year, for her hit Birds of a Feather.

The 23-year-old also scooped the award for favourite touring artist, favourite female pop artist, favourite pop album and pop song.

However, she was unable to collect her awards in person, as the singer is currently busy on her European tour.

In a video message, Eilish said she couldn't believe her huge achievement.

"This is so crazy. I feel speechless.

"I wish I could be there tonight", she added.

There were lots of performances on the night including from British music legend Sir Rod Stewart

Other big winners on the night included Gracie Abrams, who picked up new artist of the year.

She thanked her fans in her acceptance speech, who she said she had "been lucky enough to learn from."

It was a special night for Beyoncé, who won two awards, for favourite female country artist and favourite country album for Cowboy Carter.

Although the popstar has won AMAs in the past, this was the first time that she had picked up trophies in the country categories.

Kendrick Lamar took home favourite hip-hop song for Not Like Us, and SZA scooped two awards for favourite R&B song and favourite female R&B artist.

British music legend Sir Rod Stewart got a huge surprise when he was presented with the lifetime achievement award by his own children on stage.