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 Theresa Hudson
Composer Lyricist: Max Martin
Composer Lyricist: Henry Walter
℗ 2016 Simco Limited under exclusive license to Sony Music Entertainment UK Limited
Released on: 2016-11-18
Other, Programmer, Composer, Lyricist, Engineer, Producer: Dano Omelio
Background Vocal, Composer, Lyricist: Camille Purcell
Guitar, Keyboards, Programmer, Vocal, Producer: Matt Rad
Composer, Lyricist: James Abrahart
Producer: Steve James
Engineer, Performance Arranger, Vocal Producer: Maegan Cottone
Mixing Engineer: Phil Tan
Mixing Engineer: Bill Zimmerman
Engineer: Chris Bishop
Assistant Engineer: Alex Reid
Mastering Engineer: Tom Coyne
Mastering Engineer: Randy Merrill