From Nick Jonas' grand statement to Ariana Grande's grandma — the 20 moments that defined the AMAs
Celine Dion's Paris tribute, Nick Jonas' show-stopping medley and Justin Bieber among the performance highlights
Singer performed a trio of his most recent hits to close out the awards show
Harrison Ford introduced a cappella group's John Williams-inspired performance at the awards show
Pair celebrated 20th anniversary of Morissette's debut album 'Jagged Little Pill'
Rapper and soul newcomer performed powerful new track at 2015 American Music Awards
French-Canadian singer delivers breathtaking rendition of Edith Piaf's "Hymne A L'amour"
R&B singer's currently holds top spot on Billboard Hot 100
Band joined by dancing gorillas at their first AMAs performance in seven years
Singer's brother and former bandmate Joe Jonas introduced performance
No Doubt singer performed breakup ballad in front of clips of her intimate new music video
Boy band also won Favorite Duo/Group in the Pop/Rock award during ceremony
Charli XCX co-wrote pop star's latest single
Track is second single off pop-punk band's sophomore album
Singer-actress also hosting this year's ceremony