Gorgon Heap said:
... ditto my Steve Allen, Alan Alda, and Cat Stevens outlines)
ALL THE NAMES CONNECT. SCARY.
I would want to see Brooke Shields as an adult, that would be very interesting. Also, any broadway performers, like Idina Menzel (Wicked), or Norbert Leo Butz (DRS! LOVE that musical), or even John Lithgow.
I think Raven Symone from That's so Raven and the Cosby show would be really good. Apparantly she's worked with the muppets before, and she's a good singer and actress, so for sure her.
Sheryl Crow is a good musician, she could totally jam with the muppets.