Ballerini will play her hit duet "This Feeling" alongside the Chainsmokers during the special, which will also feature artists such as Dua Lipa, Ella Mai and Charlie Puth.
"I would’ve laughed at you if you would’ve told me, ‘You’re gonna end up dating a country artist.’ I would’ve said, 'That’s really funny. Never. I don’t want to date an artist.'"