Artist: Gwen Stefani - Producer: Nellee Hooper - Featuring: Slim Thug - Producer: Tony Kanal - Recording Engineer: Colin Mitchell - Recording Engineer: Simon Gogerly - Recording Engineer: Greg Collins - Asst. Recording Engineer: Jason Lader - Programming: Tony Kanal - Keyboards: Tony Kanal - Synthesizer Programming: Tony Kanal - Programming: Chipz - Programming: Aiden Love - Programming: Simon Gogerly - Programming: Jason Lader - Asst. Recording Engineer: Ian Rossiter - Asst. Recording Engineer: Kevin Mills - Keyboards: Sheldon Connch - Spoken Word: GMR - Mixer: Mark 'Spike' Stent - Assistant Mixer: David Treaheam - Programming: Lee Groves - Assistant Mixer: Rob Haggett

Producer: Dallas Austin - Artist: Gwen Stefani - Additional Producer: Nellee Hooper - Recording Engineer: Rick Sheppard - Recording Engineer: Greg Collins - Other: Rick Sheppard - Programming: Jason Lader - Asst. Recording Engineer: Doug Harms - Asst. Recording Engineer: Paul Sheehy - Asst. Recording Engineer: Ceasar Guevara - Asst. Recording Engineer: Kevin Mills - Guitar: Tony Reyes - Bass Guitar: Tony Reyes - Drums: Dallas Austin - Keyboards: Dallas Austin - Mixer: Mark 'Spike' Stent - Assistant Mixer: David Treaheam - Additional Mixer: Rob Haggett

Artist: Gwen Stefani - Producer: The Neptunes - Featuring: Elan - Remixer: Tony Kanal - Engineer: Colin Mitchell - Engineer: Neil Kanal - Programming: Tony Kanal - Programming: Neil Kanal - Keyboards: Tony Kanal - Keyboards: Neil Kanal

Artist: Gwen Stefani - Producer: Nellee Hooper