Animal

Ammo(Drums),  Ammo(Keyboards),  Andrew Snitzer(Saxophone),  Benny Blanco(Drums),  Benny Blanco(Keyboards),  Dr. Luke(Drums),  Dr. Luke(Guitar),  Dr. Luke(Keyboards),  Greg Kurstin(Keyboards),  Jim Hynes(Trumpet),  Max Martin(Keyboards),  Aniela Gottwald(Vocals (Background)),  Claude Kelly(Vocals (Background)),  Graham Bryce(Vocals (Background)),  Ke$ha(Accordion),  Lukasz "Dr. Luke" Gottwald(Vocals (Background)),  Miriam Nervo(Vocals (Background)),  Olivia Nervo(Vocals (Background)),  Tatiana Gottwald(Vocals (Background)),  The Pickleheadz(Vocals (Background)),  Ke$ha(Cowbell),  Ke$ha(Whistle),  Shellback(Whistle),  Ammo(Producer),  Benny Blanco(Engineer),  Benny Blanco(Producer),  David Gamson(Engineer),  David Gamson(Producer),  Dr. Luke(Engineer),  Dr. Luke(Producer),  Emily Wright(Engineer),  Greg Kurstin(Engineer),  Greg Kurstin(Producer),  John Hanes(Engineer),  Lukasz "Dr. Luke" Gottwald(Engineer),  Matt Beckley(Engineer),  Max Martin(Engineer),  Max Martin(Producer),  Oliver Leiber(Engineer),  Oliver Leiber(Producer),  Sam Holland(Engineer),  Seth Waldmann(Engineer),  Shellback(Engineer),  Shellback(Producer),  Tom Neville(Arranger),  Tom Neville(Engineer),  Tom Neville(Producer),  Ammo(Programming),  Anita Marisa Boriboon(Art Direction),  Anita Marisa Boriboon(Design),  Becky Scott(Production Coordination),  Benjamin Levin(Composer),  Benny Blanco(Instrumentation),  Benny Blanco(Programming),  Chris Gehringer(Mastering),  Clarke Kelly(Composer),  Claude Kelly(Composer),  David Gamson(Composer),  David Gamson(Instrumentation),  David Gamson(Programming),  Dr. Luke(Executive Producer),  Dr. Luke(Programming),  Gary "G" Silver(Production Coordination),  Greg Kurstin(Composer),  Greg Kurstin(Programming),  Jon Ingoldsby(Composer),  Joshua Coleman(Composer),  Kesha Sebert(Composer),  Lukasz "Dr. Luke" Gottwald(Composer),  Marc Nelkin(Composer),  Max Martin(Composer),  Megan Dennis(Production Coordination),  Miriam Nervo(Composer),  Neon Hitch(Composer),  Oliver Leiber(Composer),  Olivia Nervo(Composer),  Pebe Sebert(Composer),  Sean Foreman(Composer),  Serban Ghenea(Mixing),  Shelby Duncan(Photography),  Shellback(Composer),  Shellback(Instrumentation),  Shellback(Programming),  Tim Roberts(Mixing Assistant),  Tom Neville(Composer),  Tom Neville(Instrumentation),  Vanessa Silberman(Production Coordination),  Aniela Gottwald(Assistant),  Emily De Groot(Stylist),  Eric Eylands(Assistant),  Erwin Gorostiza(Creative Director),  Miriam Nervo(Vocal Producer),  Olivia Nervo(Vocal Producer),  Ramsell Martinez(Hair Stylist),  Sarai Fiszel(Make-Up),  Tatiana Gottwald(Assistant),  Vanessa Silberman(Production Assistant),  Yasmin Than(Stylist),  Ammo(Additional Production),  Dr. Luke(Vocal Editing),  Emily Wright(Vocal Editing),  Rani Hancock(A&R)