Credits are adapted from the liner notes of
Monkey Business. •
apl.de.ap – vocals (tracks 1–4, 6–8, 10–12, 14–15), Clavinet (track 8), drum machine (track 8), strings (track 8), production (track 8) •
Marcella Araica – recording engineering assistance (track 3), Pro-Tools editing (track 3) • Charlie Baccarat – electric violin (track 2) •
Printz Board – Mellotron strings (tracks 2, 7–8), Mellotron keyboards (track 13), Moog synthesizer (tracks 7 and 10), synthesizer (tracks 8 and 13), bass (tracks 8 and 10), drums (track 8), drum machine (track 13), trumpet (tracks 9–11 and 13), keyboards (track 10), Rhodes piano (track 10), production (tracks 8 and 13) • Ray Brady – guitar (tracks 4 and 7) •
James Brown – vocals (track 10) •
Venus Brown – backing vocals (track 10), A&R management • Demo Castelleon – recording engineering (track 3) •
Mino Cinelu – percussion (track 15) • Fred Davis – legal representation • Dylan "3-D" Dresdow – vocal recording engineering (track 8) •
Ron Fair – executive production, additional production (track 4), string arrangements (tracks 2 and 9), string conducting (track 9), harmonica (track 4) •
Shepard Fairey – album cover design, logo design •
Fergie – vocals (tracks 1–8, 10–11, 13, 15) • Mike Fratantuno – bass (track 13) • Seth Friedman – A&R management, cover art direction, management •
Brian Gardner – mastering •
Şerban Ghenea – mixing (tracks 5, 10–12 and 15) • Dennis Gomez – booklet design •
Cee-Lo Green – vocals (track 6) •
Keith Harris – live drums (track 7), drums (tracks 2, 7, 13 and 14), keyboards (track 7), Mellotron strings (track 7), percussion (track 8) • Tal Herzberg – recording engineering (tracks 1, 2, 4 and 9), Pro-Tools programming (tracks 2 and 4) • Julie Hovsepian – product management • Ted Howard – recording engineering (track 6) •
Tippa Irie – backing vocals (track 7) •
Jack Johnson – guitar (track 9), vocals (track 9) • Mike Jurkovac – cover art direction •
Manu Katche – drums (track 15) •
Kenny Kirkland – keyboards (track 15) •
Talib Kweli – vocals (track 6) • Sarah Larkin – business management •
John Legend – vocals (track 6) • Melvin "Chaos" Lewis – recording engineering (track 11), bass (track 11), drum machine (track 11) • Jimmy Limon – bass (track 12), Clavinet (track 12), organ (track 12), drum machine (track 12), percussion (track 12), guitar (track 12) • Lor-e – styling •
Branford Marsalis – soprano saxophone (track 15) • Edward Martinez – booklet art direction, photography •
Tony Maserati – mixing (tracks 3, 7, 8 and 13) • Michael Matthews – guitar (track 11) • Polo Molina – management • Osinachi Nwaneri – recording engineering (track 6) • Tim "Izo" Orindgreff – saxophone (tracks 9–11 and 13), flute (track 13) •
George Pajon Jr. – guitar (tracks 1–4, 8, 10 and 13) • Jack Joseph Puig – mixing (track 9) •
Q-Tip – vocals (track 6) •
Kevin Rudolf – guitar (track 3) •
Dante Santiago – backing vocals (tracks 8, 10, 11, 13 and 16–18), vocals (track 7), A&R management coordination • Justin Siegel – A&R management coordination • Madeleine Smith – music clearance •
David Sonenberg – management • Mike "Spike" Stent – mixing (tracks 1, 2 and 4) •
Sting – vocals (track 15), bass (track 15) •
Taboo – vocals (tracks 1–4, 6–8, 11, 13 and 15) • Robert "Mousey" Thompson – bass (track 10), Clavinet (track 10), drums (track 10), drum machine (track 10), organ (track 10) •
Justin Timberlake – vocals (track 3) •
Timbaland – vocals (track 3), all other instruments (track 3) • Neil Tucker – recording engineering (tracks 2, 8, 10, 11 and 13) • Andrew Van Meter – production management • Jason Villaroman – recording engineering (tracks 1, 3–5, 7, 12, 14 and 15) • Jeff Watkins – saxophone (track 10) •
Albert Watson – photography •
will.i.am – executive production, conceptual design, production (tracks 1, 2, 4–10 and 12–15), mixing (track 14), vocals (all tracks), bass (tracks 1, 4, 5, 7, 9, 10, 12 and 14), drum machine (1, 4, 5, 7, 9, 12 and 15), drums (track 15), synthesizer (tracks 1, 7, 12 and 14), Clavinet (tracks 5 and 11), organ (tracks 5 and 9), Rhodes piano (tracks 8 and 11), additional instruments (track 6) • Ethan Willoughby – recording engineering (track 6), mixing (track 6) • Damon Woods – guitar (track 10) • Florencio Zavala – album cover design, logo design ==Charts==