Artwork By [Booklet Art Direction And Photography] - Edward Martinez
Artwork By [Booklet Design] - Dennis Gomez
Artwork By [Cover & Logo Design] - Florencio Zavala , Shepard Fairey
Artwork By [Cover Art Direction] - Mike Jurkovac , Seth Friedman
Bass - Will.I.Am* (tracks: 1, 4, 5, 7, 9, 10, 12, 14)
Drum Programming - Will.I.Am* (tracks: 1, 4, 5, 7, 9, 10, 12, 15)
Engineer - Jason "Ill-Aroma" Villaroman* (tracks: 1, 3, 4, 5, 7, 12, 14, 15) , Neil Tucker (tracks: 2, 8, 10, 11, 13) , Tal Herzberg (tracks: 1, 2, 3, 9) , Will.I.Am* (tracks: 1, 2, 4 to 6, 8 to 15)
Executive Producer - Ron Fair , Will.I.Am
Guitar - George Pajon Jr. (tracks: 1 to 4, 8, 10, 13)
Mastered By - Brian Gardner , Madeleine Smith
Mixed By - Mark "Spike" Stent* (tracks: 1, 2, 4) , Serban Ghenea (tracks: 5, 10 to 12, 15) , Tony Maserati (tracks: 3, 7, 8, 13)
Other [A&r Coordination] - Dante Santiago , Justin Siegel
Other [A&r] - Seth Friedman , Venus Brown
Other [Business Manager] - Sean Larkin
Other [Conceptual Design] - Will.I.Am
Other [Legal Representation] - Fred Davis
Other [Management] - David Sonenberg , Polo Molina , Seth Friedman
Other [Product Manager] - Julie Hovsepian
Other [Production Coordinator] - Andrew Van Meter
Other [Stylist] - Lor-e Phillips
Photography - Albert Watson
Producer - Will.I.Am* (tracks: 1, 2, 4 to 10, 12 to 15)
Synthesizer [Moog] - Will.I.Am* (tracks: 1, 12, 14)
Vocals - Apl.De.Ap* (tracks: 1, 3, 4, 7, 8, 10 to 12, 14, 15) , Fergie (2) (tracks: 1, 3 to 5, 7, 8, 10, 11, 13, 15) , Taboo (9) (tracks: 1, 4, 7, 8, 11, 13, 15) , Will.I.Am* (tracks: 1, 3 to 5, 7 to 15)
Written-By - Allen Pineda* (tracks: 1, 3, 4, 6 to 8, 11, 12, 14) , Stacy Ferguson (tracks: 1 to 4, 8, 10, 15) , William Adams* (tracks: 1 to 15)