Micky Dolenz and Bobo
Micky Dolenz (b. 1945) is an actor and singer who began his career as a child performer but gained his greatest fame with the sitcom The Monkees, and the rock band specifically formed for it.
He made a cameo appearance on Muppets Tonight episode 105, singing "I'm a Believer" with Bobo.
Aside from The Monkees, Dolenz has made a career as a voice over artist, working on shows such as The Tick, Batman: The Animated Series, and The Funky Phantom. Other credits include appearances in The Brady Bunch Movie, As the World Turns, Rowan & Martin's Laugh-In, and performances on American Bandstand.