Artist: Demi Lovato - Producer: Tommy Brown - Featuring: Ariana Grande - Producer: Xavi - Vocal Producer: Mitch Allan - Recording Engineer: Billy Hickey - Mixer: Serban Ghenea - Mix Engineer: John Hanes - Strings: Peter Lee Johnson - Mastering Engineer: Kevin Reeves - Remixer: Dave Audé - Programmer: Jason Robinson - Guitar: Joshua Lutz - Remix Engineer: Loren Moore