Engineer – Jason "Ill-Aroma" Villaroman*, Tal Herzberg, Will.I.Am*Guitar – George Pajon, Jr.*Mixed By – Mark "Spike" Stent*Producer, Drum Programming, Bass, Synthesizer [Moog] – Will.I.Am*Vocals – Apl.De.Ap*, Fergie , Taboo , Will.I.Am*Written-By – Allen Pineda*, Nicholas Roubanis, Stacy Ferguson, Thomas Van Musser, William Adams*

Arranged By [String] – Ron FairDrums – Keith HarrisEngineer – Neil Tucker, Tal Herzberg, Will.I.Am*Guitar – George Pajon, Jr.*Mellotron – Printz BoardMixed By – Mark "Spike" Stent*Producer – Will.I.Am*Programmed By [Pro Tools] – Tal HerzbergSampler – Full Force, Indeewar*, Kalyanji Anandji*Violin [Electric] – Charlie BaccaratWritten-By – Full Force, George Pajon, Jr.*, Indeewar*, Kalyanji Anandji*, Printz Board, Stacy Ferguson, William Adams*

Co-producer – DanjaCoordinator – William E. Pittway Jr.*, Geneva Randolph, Michael Evans Engineer – Demo Castellon*, Jason "Ill Aroma" Villaroman*Engineer [Assistant], Edited By [Protool] – Marcella AraicaFeaturing – Justin TimberlakeGuitar – George Pajon, Jr.*, Kevin RudolfMixed By – Tony MaseratiProducer, Instruments – TimbalandScratches [DJ] – Venus BrownVocals – Apl.De.Ap*, Fergie , Justin Timberlake, Will.I.Am*Written-By – Allen Pineda*, Justin Timberlake, Ante Hills*, Stacy Ferguson, Thomas Van Musser, Timothy Mosley, William Adams*

Engineer – Jason "Ill-Aroma" Villaroman*, Tal Herzberg, Will.I.Am*Guitar – George Pajon, Jr.*, Ray BradyMixed By – Mark "Spike" Stent*Producer [Additional], Harmonica – Ron FairProducer, Drum Programming, Bass – Will.I.Am*Programmed By [Protools] – Tal HerzbergSampler – Ricky WaltersVocals – Apl.De.Ap*, Fergie , Taboo , Will.I.Am*Written-By – Allen Pineda*, Chris Peters, Drew Peters, Jaime Gomez, Ricky Walters, Stacy Ferguson, William Adams*

Engineer – Jason "Ill-Aroma" Villaroman*, Will.I.Am*Mixed By – Serban GheneaProducer, Drum Programming, Bass, Clavinet, Organ – Will.I.Am*Sampler – David PaytonVocals – Fergie , Will.I.Am*Written-By – David Payton, William Adams*

Engineer – Ethan Willoughby, Osinachi Nwaneri, Ted Howard, Will.I.Am*Featuring – Cee-Lo, John Legend, Q-Tip, Talib KweliMixed By – Ethan WilloughbyProducer, Instruments – Will.I.Am*Sampler – Anthony Newley, Leslie BricusseWritten-By – Allen Pineda*, Anthony Newley, Jaime Gomez, Kamaal Fareed, Leslie Bricusse, Talib Kweli Greene, William Adams*

Backing Vocals – Tippa IrieDrums [Live], Drums, Keyboards – Keith HarrisEngineer – Jason "Ill Aroma" Villaroman*Featuring – Dante SantiagoGuitar – Ray BradyMellotron – Keith Harris, Printz BoardMixed By – Tony MaseratiProducer, Drum Programming, Bass, Synth – Will.I.Am*Sampler – Benjamin Brown, Fitzroy Simpson, George Bennett, Donat Mittoo*, Leroy Sibblis*, Lloyd Ferguson, Robert Lyn*Synthesizer [Moog] – Printz BoardVocals – Apl.De.Ap*, Fergie , Taboo , Will.I.Am*Written-By – Allen Pineda*, Benjamin Brown, Fitzroy Simpson, George Bennett, Donat Mittoo*, Leroy Sibblis*, Lloyd Ferguson, Printz Board, Ray Brady, Robert Lyn*, William Adams*

Backing Vocals – Dante SantiagoBass, Mellotron, Synth, Drums – Printz BoardCo-producer – Printz Board, Will.I.Am*Electric Piano [Rhodes] – Will.I.Am*Engineer – Neil Tucker, Will.I.Am*Engineer [Vocals] – Dylan DresdowGuitar – George Pajon, Jr.*Mixed By – Tony MaseratiPercussion – Keith HarrisProducer, Drum Programming, Clavinet, Strings – Apl.De.Ap*Vocals – Apl.De.Ap*, Fergie , Taboo , Will.I.Am*Written-By – Allen Pineda*, Stacy Ferguson, William Adams*

Arranged By [Strings], Conductor – Ron FairCello – Cecilia Tsan, David Low, Steve Erdody, Suzie KatayamaEngineer – Tal Herzberg, Will.I.Am*Guitar, Sampler – Jack JohnsonMixed By – Jack Joseph PuigProducer, Vocals, Drum Programming, Bass, Organ [Hammond] – Will.I.Am*Saxophone – Tim "Izo" Orindgreff (Aka "The Horndogs")*Trumpet – Printz BoardViola – Brian Dembow, Matt Funes, Simon Oswell, Vicki MiskolczyViolin – Alan Grunfeld, Bruce Dukov, Charlie Bisharat, Endre Granat, Jackie Brand, Joel Derouin, Josefina Vergara, Julie Gigante, Katia Popov, Mario DeLeon, Natalie Leggett, Phillip Levy, Rene Mandel, Roberto Cani, Sarah Thornblade, Sid Page, Songa Lee, Tamara HatwanWritten-By – Jack Johnson, William Adams*

Backing Vocals – The BittersweetsBass – Printz Board, Will.I.Am*Drum Programming, Bass, Clavinet, Organ, Drums – Robert "Mousey" Thompson*Engineer – Neil Tucker, Will.I.Am*Featuring – James BrownGuitar – Damon Woods, George Pajon, Jr.*Mixed By – Serban GheneaProducer – Will.I.Am*Sampler – Darryl Barnes, Greg MaysSaxophone – Jeff Watkins, Tim "Izo" Orindgreff (Aka "The Horndogs")*Trumpet, Synthesizer [Moog], Electric Piano [Rhodes], Synthesizer [MS2000] – Printz BoardVocals – Apl.De.Ap*, Fergie , James Brown, Will.I.Am*Written-By – Darryl Barnes, Greg Mays, James Brown, Printz Board, Stacy Ferguson, Timothy Orindgreff*, William Adams*

Backing Vocals – Dante SantiagoClavinet, Electric Piano [Rhodes] – Will.I.Am*Drum Programming, Bass – Chaos Engineer – Chaos , Neil Tucker, Will.I.Am*Guitar – Michael MatthewsMixed By – Serban GheneaProducer – Noize TripSaxophone – Tim "Izo" Orindgreff (Aka "The Horndogs")*Trumpet – Printz BoardVocals – Apl.De.Ap*, Fergie , Taboo , Will.I.Am*Written-By – Allen Pineda*, Anthony Tidd, Jean Baptiste , Melvin J. Lewis*, Michael Matthews, William Adams*

Bass, Drum Programming – Jimmy Limon, Will.I.Am*Drum Programming, Bass, Clavinet, Organ, Guitar, Percussion – Jimmy LimonEngineer – Jason "Ill-Aroma" Villaroman*, Will.I.Am*Mixed By – Serban GheneaProducer, Synth – Will.I.Am*Vocals – Apl.De.Ap*, Will.I.Am*Written-By – Allen Pineda*, William Adams*

Backing Vocals – Dante SantiagoBass – Mike Fratantuono*, Printz BoardDrum Programming, Trumpet, Synth, Mellotron – Printz BoardDrums – Keith HarrisEngineer – Neil Tucker, Will.I.Am*Guitar – George Pajon, Jr.*Mixed By – Tony MaseratiProducer – Printz Board, Will.I.Am*Sampler – Larry Blackmon, Thomas Jenkins*Saxophone, Flute – Tim "Izo" Orindgreff (A.K.A. "The Horndogs")*Vocals – Fergie , Taboo , Will.I.Am*Written-By – Larry Blackmon, Printz Board, Thomas Jenkins*, William Adams*

Drums – Keith HarrisEngineer – Jason "Ill Aroma" Villaroman*, Will.I.Am*Producer, Mixed By, Bass, Synth – Will.I.Am*Sampler – Rick JamesVocals – Apl.De.Ap*, Will.I.Am*Written-By – Allen Pineda*, Keith Harris, Rick James, William Adams*

Drums – Manu Katche*, Will.I.Am*Engineer – Jason "Ill-Aroma" Villaroman*, Will.I.Am*Featuring, Bass, Sampler – StingKeyboards – Kenny KirklandMixed By – Serban GheneaPercussion – Mino CineluProducer, Drum Programming – Will.I.Am*Saxophone – Branford MarsalisVocals – Apl.De.Ap*, Fergie , Sting, Taboo , Will.I.Am*Written-By – George Pajon Jr., Stacy Ferguson, Sting, William Adams*

Written-By – John Stephens , Ray Brady, Will.I.Am*

Mixed By – Chris Holmes Remix – Travis Barker

Engineer – Anthony Tidd, Melvin "Chaos" LewisRemix, Producer – Noizetrip*