“It Ain’t Me” is an uptempo tropical house breakup song. It features Selena Gomez on vocals. In the song, Selena breaks up with someone by asking who will take care of him—when that person isn’t her. Actor Vin Diesel is mistakenly credited as a background vocalist, when what he actually did was an in-studio cover version of the track with Kygo himself in the booth; adding several ad-libs during the beatdrops.

The track is the first single from the second studio album by Norwegian EDM producer Kygo. The song was released on Kygo’s official Vevo, after previews on Selena’s Instagram.