5. Richard Pryor, "Balloon Vendor," The Muppet Movie
The way he looks back and forth before suggesting to Gonzo, "Why not take both?" is pure Pryor.
4. Kathy Griffin, "Female Armed Guard," Muppets From Space
Our favorite D-list celebrity gets goosed by an invisible Animal -- and falls madly in love.
3. Ray Liotta, "Gate Guard," Muppets From Space
Liotta takes a turn for the family-friendly; Miss Piggy seduces her way past him. Are we seeing a theme here?
2. Joan Rivers, "Perfume counter salesman," The Muppets Take Manhattan
Joan Rivers gives Piggy a makeover when she's bummed over Kermit. Hysterical laughing ensues.
1. Steve Martin, "Insolent Waiter," The Muppet Movie
After belittling Kermit's wine choice, Martin offers him the bottlecap for a sniff. (Also, his legs look fantastic in those shorts.)