Credits

Gwen Stefani: Vocals
Calvin Harris: Producer, Engineer, Instrumentation, Mixing, Vocals
Big Sean: Vocals
Manny Marroquin: Mixing
Mike Marsh: Mastering
Simon Davey: Mastering
Ellie Goulding: Vocals
Alesso: Producer, Engineer, Mixing
Ummet Ozcan: Producer, Instrumentation, Mixing
Tinashe: Vocals
Danielle Haim: Guitar
R3hab: Producer, Instrumentation, Mixing
John Newman: Vocals
Ariel Rechtshaid: Additional Production, Keyboards
Chris Galland: Mixing Assistant
HAIM: Vocals
Firebeatz: Producer, Instrumentation, Mixing
Ike Schultz: Mixing Assistant
Vanya Taylor: Vocals
Seb Berrios: Vocal Engineer
Arthur Indrikovs: Vocal Engineer