From the best vocals we've seen from Ariana Grande and One Direction to Meghan Trainor and Charlie Puth's onstage butt grabbing, these are the 10 performances you couldn't have missed from the 2015 American Music Awards.
Céline Dion was chosen to perform a tribute to the city of Paris and those fallen in the terrorist attacks less than two weeks ago. What a perfect choice she was.
Backed by a symphony, the Québec powerhouse belted her way through a performance of "Hymne à L'amour" by Édith Piaf, as images of the French city and memorials to the dead were shown on the screens behind her. Celine was a total pro at handling what was obviously an emotionally raw performance. It clearly affected the audience too, as the camera panned to the teary-eyed crowd, which included Demi Lovato.
In a meeting of movies and music, Pentatonix opened a tribute to Star Wars by singing John Williams' famous score, before the a cappella act performed with a full symphony while classic footage from the film played behind. Even better: PTX wore costumes inspired by the movie, too.
A performance that wowed a cappella nerds, Star Wars geeks and everyone in between? What a cool world we live in here in 2015.
The Weeknd somehow found a way to make his live show that much more soul-stirring by performing in a literal ring of fire. The star delivered his No. 1 hit "The Hills" on a smoldering stage, in what was undoubtedly one of the hottest performances of the night.
Artist of the Year winners One Direction may be going on hiatus soon, but they're at least going out with a bang. The quartet performed new single "Perfect" and offered more intricate harmonies than we're used to hearing from the act. It's these types of performances that prove 1D isn't your run-of-the-mill boy band, and we hope to see more vocal showings like this in their future (post-hiatus of course).
Her main gig of the night might have been host, but Jennifer Lopez kicked off the 2015 AMAs on a note that likely made all the other performers up their game. After she began with a gorgeous cabaret version of her 1999 hit "Waiting for Tonight," Lopez's set got even better when she broke it down to a slew of hits from the past year, with an army of bootyshakers backing her.
For a medley that included "Like I'm Gonna Lose You" and "Marvin Gaye," Meghan Trainor and Charlie Puth's performance already had a charming throwback feel, with Trainor's adorable choreographed dancing and Puth crooning at a piano. But the two really made this one to remember when they ended it with a mini-makeout session that saw Puth full-on grabbing his duet partner's bum. We asked ourselves "Why?" but also asked "Why not?"
For the debut TV performance of new single "Focus," Ariana Grande brought loads of glamour, sass and impressive big notes. The tiny diva strutted her way on the classic Hollywood-inspired stage in an old-school frock and with bright red lips, as she showed some of the most strongest vocal runs of her career. She mixed the high notes in with adorable little "excuse me's" and "oh pardon me's" to her dancers, which recalled an old musical scene from yesteryear.
Macklemore and Ryan Lewis could have easily brought a jam session to the AMAs and it would have been fine. Instead, the duo shifted our expectations and delivered an impassioned performance to debut their new single "Kevin," featuring the underrated soul singer Leon Bridges.
Macklemore spit verses about addiction, recovering and death, and the solemn tune was a clear shift from past single "Downtown," which would have brought the aforementioned party to the stage. Macklemore and co. instead opted to give us one of the night's more stirring moments.
Gwen Stefani is in the midst of a divorce from longtime husband Gavin Rossdale, and the No Doubt diva brought her emotions to the 2015 AMAs stage for the biggest performance of new single "Used to Love You" yet. Her feelings were palpable on a gorgeous-but-eerie stage that showed clips from the singer's "Used to Love You" video, along with previously unseen footage that included Gwen sobbing into her arms. It was the details that mattered here, and we think Gwen nailed them.
Justin Bieber ended the AMAs with a worthy finale that showcased all of the different aspects that make the pop star special. It started with the superstar going acoustic for "What Do You Mean?," with just a guitar backing him, before he broke into "Where Are U Now?," that included what's probably the most impressive dance break he's ever performed on TV. Bieber ended with "Sorry," where a waterfall of raindrops fell on him.
It was a very symbolic moment for Bieber, who just snagged his sixth No. 1 album and has seemingly been absolved of his past sins and is now a new, adult superstar.