Must B 21 (Soundtrack to Get Things Started) is the second solo studio album by American musician will.i.am. It was released on September 23, 2003, via will.i.am Music Group and Barely Breaking Even. Produced by will.i.am himself together with Printz Board, it features guest appearances from Supernatural, Dante Santiago, Flii, John Legend, Planet Asia, Krondon, KRS-One, MC Lyte, Niu, Phife Dawg, Phil Da Agony, Tash and Triple 7, as well as his Black Eyed Peas groupmates Fergie and Taboo.