Artwork By [Creative Direction, Design, Digital Imaging] - Morbido / Bizarrio - Vince, California
Bass - Tony Kanal
Cello - Melissa Hasin (tracks: 8, 10)
Drums, Percussion - Adrian Young
Guitar - Tom Dumont
Keyboards [Additional] - Matthew Wilder (tracks: 3, 6)
Mastered By - Robert Vosgien
Mixed By - Holman* , Paul Palmer
Other [Booking Agency] - Mitch Okmin / MOB
Other [Business Management] - Debra Boylan / Siegel , Duffin , Feldstein , Larry Eindbund , Vuylsteke
Other [Interscope A&r Assistance] - Brent Smith
Other [Interscope A&r Direction] - Tony Ferguson
Other [Legal Representation] - Esq. / Codikow & Carroll , Seth Lichtenstein
Other [Merchandise] - Kevin Matthew Frawley
Other [Stage Tech] - Donnie Spada
Other [Trauma Records A&r Direction] - Paul Palmer , Rob Kahane
Photography - Daniel Arsenault , Patrick Miller , Shelly Robertson
Piano, Keyboards - Eric Stefani
Producer - Matthew Wilder
Recorded By - George Landress (tracks: 3, 6, 7) , John 'Tokes' Potoker* (tracks: 11 to 13) , Matt Hyde (tracks: 1, 2, 13) , Phil Kaffel (tracks: 3 to 10, 14)
Saxophone - Bill Bergman (tracks: 11, 12) , Gerard Boisse (tracks: 5, 7, 14)
Saxophone [Baritone] - Greg Smith (tracks: 11, 12)
Trombone - Nick Lane (tracks: 11, 12)
Trombone, Percussion [Additional] - Gabe McNair*
Trumpet - Les Lovitt (tracks: 11, 12) , Phil Jordan
Vocals - Gwen Stefani
Written-By - No Doubt