Black Eyed Peas leader William “will.i.am” Adams has built a diverse portfolio as a producer. He's represented his West Coast roots with trunk-rattling bangers for The Game and Too $hort, provided a buoyant bassline-driven groove for Estelle's “American Boy” and co-written John Legend's regal piano ballad “Ordinary People”, all while producing pop-rap hits for Nicki Minaj and his own group.