Written-By – Nicholas Roubanis, Thomas Van Musser

Arranged By [Strings] – Ron FairDrums – Keith HarrisMellotron [Mellotron Strings] – Printz BoardProgrammed By [Pro Tools Programming] – Tal HerzbergViolin [Electric] – Charlie BaccaratWritten-By – Full Force, George Pajon Jr., Kalyanji Anandji*, Printz Board

Co-producer – DanjaEdited By [Assistant Engineer - Protool Editing] – Marcella AraicaEngineer – Demo Castellon*Guitar – Kevin RudolfManagement [Production Coordinator] – Geneva Randolph, Michael Evans Performer [All Instruments Except Guitar] – TimbalandProducer – TimbalandScratches – Venus BrownVocals – Justin TimberlakeWritten-By – Justin Timberlake, Ante Hills*, Thomas Van Musser, Timothy Mosley

Guitar – Ray BradyHarmonica – Ron FairProducer [Additional] – Ron FairProgrammed By [Protools] – Tal HerzbergWritten-By – Chris Peters, Drew Peters, Ricky Walters

Clavinet, Organ – Will.I.Am*Written-By – David Payton

Engineer – Ethan Willoughby, Osinachi Nwaneri, Ted HowardMixed By – Ethan WilloughbyPerformer [All Instruments] – Will.I.Am*Rap [Featuring] – Cee-Lo, Q-Tip, Talib KweliVocals [Featuring] – John LegendWritten-By – Anthony Newley, Jaime Gomez, Kamaal Fareed, Leslie Bricusse, Talib Kweli Greene

Backing Vocals – Tippa IrieDrums [Live], Drums, Keyboards – Keith HarrisGuitar – Ray BradyMellotron [Mellotron Strings] – Keith Harris, Printz BoardSynthesizer – Will.I.Am*Synthesizer [Moog] – Printz BoardVocals [Featuring] – Dante SantiagoWritten-By – Benjamin Brown, Fitzroy Simpson, George Bennett, Donat Mittoo*, Leroy Sibblis*, Lloyd Ferguson, Printz Board, Ray Brady, Robert Lyn*

Backing Vocals – Dante SantiagoBass, Strings [Mellotron], Synthesizer, Drums – Printz BoardCo-producer – Printz BoardDrum Programming, Clavinet, Strings – Apl. De ApElectric Piano [Rhodes] – Will.I.Am*Engineer [Vocals] – Dylan DresdowPercussion – Keith HarrisProducer – Apl. De Ap

Arranged By [Strings], Conductor [Strings] – Ron FairCello – Cecilia Tsan, David Low, Steve Erdody, Suzie KatayamaGuitar, Vocals [Uncredited], Written-By – Jack JohnsonMixed By – Jack Joseph PuigOrgan [Hammond] – Will.I.Am*Saxophone – Tim "Izo" OrindgreffTrumpet – 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*, Tammy Hatwan*

Backing Vocals – Cynthia Moore, Dante Santiago, Kelly Jarrell, Sheila Wheat, The Bittersweets, Venus BrownClavinet, Organ – Will.I.Am*Drums – Robert "Mousey" Thompson*Guitar – Damon WoodsSaxophone – Jeff Watkins, Tim "Izo" OrindgreffTrumpet, Synthesizer [Moog], Electric Piano [Rhodes], Bass, Synthesizer [Ms2000] – Printz BoardVocals [Featuring] – James BrownWritten-By – Darryl Barnes, Greg Mays, James Brown, Printz Board, Timothy Orindgreff*

Backing Vocals – Dante SantiagoClavinet, Electric Piano [Rhodes] – Will.I.Am*Engineer, Drum Programming, Bass – Chaos Guitar – Michael MatthewsProducer – Noize TripSaxophone – Tim "Izo" OrindgreffTrumpet – Printz BoardWritten-By – Anthony Tidd, Jean Baptiste , Melvin J. Lewis*, Michael Matthews

Drum Programming, Bass, Clavinet, Organ, Guitar, Percussion – Jimmy Limon

Backing Vocals – Dante SantiagoBass – Mike Fratantuono, Printz BoardDrum Programming, Trumpet, Synthesizer, Synthesizer [Mellotron] – Printz BoardDrums – Keith HarrisProducer – Printz BoardSaxophone, Flute – Tim "Izo" OrindgreffWritten-By – Larry Blackmon, Printz Board, Thomas Jenkins*

Drums – Keith HarrisMixed By – Will.I.Am*Written-By – Keith Harris, Rick James

Drums – Manu Katche*, Will.I.Am*Keyboards – Kenny KirklandPercussion – Mino CineluSaxophone – Branford MarsalisVocals, Bass – StingWritten-By – George Bajon Jr., Sting