Artist: Gwen Stefani - Producer: Luke Niccoli - Mixer: Tony Maserati - Vocalist: Gwen Stefani - Bass: Luke Niccoli - Guitar: Luke Niccoli - Keyboards: Luke Niccoli - Programming: Luke Niccoli - Background Vocalist: Ross Golan - Clapping: Ross Golan - Recording Engineer: Karl Wingate - Mastering Engineer: Chris Gehringer - Composer/Author: Gwen Stefani