Producer: Dreamlab - Artist: Katy Perry - Remixer: Syn Cole - Producer: Zedd - Additional Mixer: Ryan Shanahan - Mixer: Zedd - Vocals: Katy Perry - Programming: Daniel James - Background Vocalist: Gino Barletta - Background Vocalist: Hayley Warner - Background Vocalist: Leah Haywood - Programming: Leah Haywood - Programming: Zedd - Mastering Engineer: Syn Cole