Black Eyed Peas – Elephunk

Drum Programming, Synthesizer [Moog] – Will I Am
Engineer [Assistant] – Christine Sirois
Written-By – George Pajon Jr.
Written-By – Billy May
Written-By – Mike Fratantuno

Drums, Piano – Will I Am
Horns – Tim "Izo" Orindgreff
Horns – Printz Board
Written-By – Bootsy Collins
Written-By – Darryl Hassan Jamison
Written-By – Johnny Griggs
Written-By – James Brown
Written-By – Thomas Van Musser
Written-By – Robert Chopper McCollough
Written-By – Frank Waddy
Written-By – Clyde Stubblefield
Written-By – Catfish Collins
Written-By – Clayton Gunnells

Backing Vocals – Noelle Scaggs
Drums – Terence Yoshiaki
Engineer [Vocals] – Dylan Dresdow
Written-By – George Pajon Jr.
Written-By – Terence Yoshiaki
Written-By – Mike Fratantuno

Drum Programming, Organ [Wurlitzer], Synthesizer [Moog] – Will I Am
Vocals [Additional] – Tippa Irie
Written-By – Anthony Henry

Drum Programming, Synthesizer [Moog] – Will I Am
Engineer [Additional & Pro Tools] – Tal Herzberg
Engineer [Assistant] – Christine Sirois
Guitar – Ray Brady
Producer [Additional Vocal Production] – Ron Fair
Written-By – George Pajon Jr.
Written-By – J. Curtis

Backing Vocals – Noelle Scaggs
Backing Vocals – Terry Dexter
Drum Programming – Will I Am
Engineer [Assistant] – Christine Sirois
Trombone – Elizabeth Ann Lea
Written-By – George Pajon Jr.
Written-By – Mike Fratantuno

Congas – Davey Chegwidden
Drum Programming – Will I Am
Drums – Terence Yoshiaki
Engineer [Assistant] – Christine Sirois
Flute, Saxophone – Tim "Izo" Orindgreff
Percussion – Chuck Prada
Piano – Ron Fair
Trumpet – Printz Board
Vocals [Additional] – Dante Santiago
Vocals [Additional] – Debi Nova
Written-By – George Pajon Jr.
Written-By – Debi Nova
Written-By – J. Curtis

Drum Programming, Synthesizer [Moog] – Will I Am
Piano – Sérgio Mendes
Written-By – Antonio Carlos Jobim
Written-By – Vinicius De Moraes

Drum Programming, Synthesizer [Moog] – Will I Am
Guitar – Ray Brady
Written-By – Ray Brady
Written-By – Stacy Ferguson

Drum Programming, Synthesizer, Mixed By, Synthesizer [Moog] – Will I Am
Engineer – Jun Ishizeki
Vocals [Additional] – John Stephens (3)
Written-By – Will I Am
Written-By – Thomas Van Musser
Written-By – John Stephens (3)

Drum Programming, Producer – Apl. De Ap
Engineer – Jason Villaroman
Synthesizer [Moog] – Will I Am

Bass, Guitar – Tobin J Esperance
Clavinet – Will I Am
Drums – Dave Buckner
Mixed By – Chris Lord-Alge
Performer [With], Written-By – Papa Roach
Vocals [Additional] – Jacoby Shaddix

Acoustic Guitar, Double Bass [Upright Bass] – Mike Fratantuno
Arranged By [Strings], Conductor, Producer – Ron Fair
Clavinet, Synthesizer [Moog] – Will I Am
Clavinet, Synthesizer [Moog] – Printz Board
Engineer [Additional & Pro Tools] – Tal Herzberg
Engineer [Assistant] – Christine Sirois
Rap – Jaime Gomez
Rap – Allan Pineda
Recorded By [Strings] – Frank Wolf
Vocals [With] – Justin Timberlake
Written-By – Justin Timberlake
Written-By – George Pajon Jr.
Written-By – Printz Board
Written-By – J. Curtis
Written-By – Mike Fratantuno

Engineer, Mixed By, Producer – Will Adams
Percussion – Chuck Prada