Dark Horse

Producer, Programmer: Dr. Luke
Producer, Programmer, Associated Performer, Background Vocalist: Max Martin
Producer, Programmer: Cirkut
Studio Personnel, Mixer: Serban Ghenea
Studio Personnel, Engineer: Peter Carlsson
Studio Personnel, Engineer: Mike Foster
Studio Personnel, Engineer: Clint Gibbs
Studio Personnel, Engineer: Sam Holland
Studio Personnel, Engineer: Michael Ilbert
Studio Personnel, Asst. Recording Engineer: Eric Eylands
Studio Personnel, Asst. Recording Engineer: Rachael Findlen
Studio Personnel, Asst. Recording Engineer: Justin Fox
Studio Personnel, Asst. Recording Engineer: Elliot Lanam
Studio Personnel, Asst. Recording Engineer: Cory Bice
Studio Personnel, Mix Engineer: John Hanes
Associated Performer, Vocals, Background Vocalist: Katy Perry
Associated Performer, Vocals: Juicy J
Associated Performer, Additional Vocals: Ava James
Studio Personnel, Production Coordinator: Irene Richter
Composer Lyricist: Katy Perry
Composer Lyricist: Jordan Houston
Composer Lyricist: Lukasz Gottwald
Composer Lyricist: Sarah Hudson
Composer Lyricist: Max Martin
Composer Lyricist: Henry Walter

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