But if you didn't catch the 3-hour show, you're in luck. We're breaking down the can't-miss moments right here. Here's what everyone will still be talking about come Monday morning.
Kelly Clarkson and P!nk's Performance
Two of the most powerful voices in music, P!nk and Kelly Clarkson, performed together for the first time on Sunday night at the American Music Awards.
The two opened the show with a duet of R.E.M.'s "Everybody Hurts," dedicated to first responders who have rushed into some of the year's most horrific events, including floods, hurricanes and shootings. With some of those servicemen and women on stage, the duo sang as a photo montage played behind them.
Jamie Foxx introduced the number, stressing the importance of music to "help us escape the news of the day" in 2017. "We needed that power of music to help us heal, form hurricanes, wild fires, hate, hatred fueled violence," he said. "2017 was a year that tested our faith."
"We look forward to 2018 with hope, for even as we mourn those who were lost, we know this: Together our strength will pull us through, together we shall overcome the pain, together we can unite as a people and a nation," he added, before the two women came out to perform.
The duet got a standing ovation.
Selena Gomez Returns to the Stage
Selena hit the stage for her only television performance of the year and her first since undergoing a kidney transplant in the summer.
Clad in a white nightgown, sneakers and sporting her new blonde 'do, Selena sang "Wolves" in a set that looked like the woods. Surrounded by a bunch of backup dancers and a red car, she ended the song bloodied and battered.
While fans were happy to see her back at the AMAs, she took some heat on social media, where many called her out for lip syncing.
I was just about to say how nice it was to see all the performers singing live and not lip synching....until Selena Gomez came on... #AMAs pic.twitter.com/XQlMFue9on
Christina Aguilera had jaws hitting the floor at the 2017 American Music Awards on Sunday night, as she brought down the house with a medley of songs from "The Bodyguard."
The "Dirrty" singer paid tribute to Whitney Houston and the music from the 1992 film to celebrate its 25th anniversary. With her hair slicked back and rocking a black silk dress, Aguilera was giving the audience life as she sang her way through "I Will Always Love You," "I Have Nothing," "Run to You" and "I'm Every Woman." Among the stars in awe of her voice were P!nk, Chrissy Metz and Rachel Platten, who the camera cut to during the soaring selection of songs.
After a reaction shot of P!nk was interpreted as shade towards Aguilera, she took to Twitter to clear the air.
Yes. THIS. Christina fucking killed it tonight for one of our favorite singers ever. This about Whitney, and I am in awe of Christina's talent. Show the clip where I'm in tears, you negative Nancy's 🤘🏽✌🏼❤️ https://t.co/5Lroq73xrQ
Linkin Park picked up the award for Alternative Rock and took time to honor their late bandmate, who committed suicide earlier this year.
"We want to dedicate this award to him, to his memory, to his talent, to his sense of humor, to his joy," said Mike Shinoda. "Remember you guys, all of your tonight, I want you guys to take a moment to appreciate what you've got and make Chester proud."
BTS Makes Their US Debut
After a big win at the Billboard Music Awards earlier this year, K-Pop band BTS performed for the first time on American television at the AMAs. The seven-member group known as "Bangtan Sonyeondan" (Bulletproof Boy Scouts) consists of Jin, Suga, J-Hope, Rap Monster, Jimin, V and Jungkook.
Their performance was crazy energetic and clearly had a fan in Ansel Elgort, who was seen Snapchatting the number. They got one of the biggest applauses of the night and Jared Leto even gave them props when he came out to introduce the next act.
"I need a moment to recover from that performance, that was incredible," said Leto.
Diana Ross' Lifetime Achievement Award Win
Diana Ross performed an epic medley of her hits before she was bestowed the Lifetime Achievement Award.
The living legend had everyone on their feet as she sang singles like "I'm Coming Out," "Ease on Down the Road" and "The Best Years of My Life."
Her grandchildren all joined her on stage during "Ain't No Mountain High Enough," before her entire family followed suit and her daughter Rhonda gave a passionate speech.