Get Ready to Sob Buckets Over A Great Big World and Christina Aguilera's Performance

A Great Big World and Christina Aguilera made an iconic return to the American Music Awards on Sunday. After performing their Grammy-winning hit "Say Something" during the award show in 2013, the pop duo and singer returned to the stage to sing their new song "Fall on Me." As Ian Axel played the piano, Aguilera moved us to tears with her incredible vocals. Grab some tissues and watch their heartfelt performance ahead.