Ozzy Osbourne

Ozzy Osbourne is a musician who also has his own TV show.

History
Bart and Homer watched two TV shows in which he appears, in the two shows his only line was "Where am I?".

Non-canon
At the Grammy Awards, when it was announced that the award for best hardcore thrash metal went to "Simpsons Christmas Boogie", Ozzy got angry and bit the head off of the Grammy award, then spat it out.

Behind the Laughter
did not do the voice of the Ozzy Osbourne character, Dan Castellaneta did.