5. Wild Thornberrys - Donnie (1998 2004)
If you thought Flea tore up the bass, he frigging murders the English language as Donnie on Nickelodeon cartoon. Yes, its not technically a cameo; the Wild Thornberrys is rather his longest running acting role. Going from 1998-2004 (during that time RHCP released Californication & By the Way so not a bad way to bring in the millennium) not including three feature roles in The Wild Thornberrys Movie, Rugrats Go Wild & The Wild Thornberrys: The Origin of Donnie. But considering that Donnie doesnt have a single audible line throughout the series, it makes the list. Plus, who else aside from Flea could pull that off? For those who cant hear the resemblance, Fleas been known to break out his Donnie voice on stage which Im sure confused the hell out of anyone born before 1991. http://www.youtube.com/watch?v=5g1AYRuhqbw