Ozzy Osbourne
From Muppet Wiki
Ozzy Osbourne (b. 1948) is famous for the urban legend of his biting the heads off bats during his stage concerts, and then again for his MTV reality show, The Osbournes.
He recorded a version of Born To Be Wild with Miss Piggy for Kermit Unpigged, although the two were very likely recorded separately.
He appeared alongside Kermit the Frog at the Golden Jubilee for Queen Elizabeth II.
He appeared in "Yakety Yak - Take It Back", a 1991 recycling PSA that eventually aired on Sesame Street.

