Credits

Ayatollah: Producer
DJ Premier: Producer
Ge-Ology: Producer
Psycho Les: Producer
Mos Def: Bass, Congas, Producer, Percussion, Keyboards, Vibraphone
will.i.am: Keyboards
Weldon Irvine: Keyboards, Organ, Piano, Strings, Arranger
Mr. Khaliyl: Producer
88-Keys: Producer
David Kennedy: Producer
Ali Shaheed Muhammad: Producer
DJ Etch-A-Sketch: Producer, Scratches
Derick Prosper: Producer
Johnny Why : Guitar