Muppet wonders will never cease. I thought I knew or had seen every 90s Muppet show/special. Wrong. In 1995 Robert Downey Jr starred as Mr Willowby in this 30 minute Muppet Musical. He sings and dances!
Stockard Channing (with a Swedish accent?) and Leslie Nielsen are in it. Ii ts pretty mild overall, Ive just never heard another person talk about this.