Producer: Dr. Dre - Artist: Gwen Stefani - Featuring: Eve - Recording Engineer: Mauricio "Veto" Iragorri - Recording Engineer: Greg Collins - Asst. Recording Engineer: Francis Forde - Asst. Recording Engineer: Brad Winslow - Asst. Recording Engineer: Jaime Sickora - Keyboards: Mike Elizondo - Keyboards: Mark Batson - Guitar: Mike Elizondo - Bass, Keyboards: Mark Batson - Mixer: Dr. Dre - Assistant Mixer: Rouble Kapoor

Artist: Gwen Stefani - Producer: Nellee Hooper - Mixer: Mark 'Spike' Stent - Recording Engineer: Greg Collins - Recording Engineer: Ian Rossiter - Asst. Recording Engineer: Kevin Mills - Programming: Samuel Littlemore - Guitar: Linda Perry - Keyboards: Linda Perry - Guitar: Rusty Anderson - Background Vocalist: Mimi Parker - Assistant Mixer: David Treaheam - Assistant Mixer: Rob Haggett