Not content with resting on the laurels of adding punk icon Iggy Pop or L.A. rockers The Red Hot Chili Peppers to its cast list, the crew of Lil' Bush has enlisted the vocal talents of Prince PopoZão himself, Kevin Federline to rap as Lil' Karl "MC" Rove. Britney's Baby Daddy will make his series voiceover debut next month during the second season of the hit show.