Artist: Katy Perry - Producer: Klas Åhlund - Featuring: RiFF RAFF - Mixer: Serban Ghenea - Engineer: Michael Ilbert - Engineer: Peter Carlsson - Engineer: Sam Holland - Asst. Recording Engineer: Cory Bice - Mix Engineer: John Hanes - Vocalist: Katy Perry - Programmer: Klas Åhlund - Programmer: Max Martin