Producer: Charlie Puth - Artist: Katy Perry - Producer: Johan Carlsson - Artist: Win and Woo - Vocal Producer: Peter Karlsson - Remixer: Win and Woo - Mixer: Serban Ghenea - Programming: Win and Woo - Background Vocalist: Charlie Puth - Drum Programming: Charlie Puth - Synthesizer: Charlie Puth - Vocals: Katy Perry - Background Vocalist: Johan Carlsson - Drum Programming: Johan Carlsson - Guitar: Johan Carlsson - Rhodes: Johan Carlsson - Synthesizer: Johan Carlsson - Mastering Engineer: Win and Woo Mastering - Composer/Author: Katy Perry