I think I have a few ideas myself.......
In a Wicked themed episode:
Popular- sung by Miss Piggy (I'd like to see her do this while giving Annie Sue a makeover (which doesn't go out too well.....))
Dancing Through Life (the first part with Fiyero singing)- either lead by Kermit or Floyd and a bunch of "teenage looking" whatnots (Then it leads to this ballroom (same one as for the At The Dance segments) where they do the dance routine. Unfortunately, the whatnots are confused on what to do, so they each do their own crazy dance with their partner. Then Gonzo and Camilla will sing the part where Boq confesses his love to Nessa (Unfortunately, Camilla has never danced with Gonzo before, so when Gonzo tries to lift Camilla, she ends up flying right off the stage, but Gonzo doesn't realize it until the end of the song)
As Long As You're Mine- either sung by Kermit and Miss Piggy or Floyd and Janice backed up by the rest of the Electric Mayhem and Rowlf.
Defying Gravity (the solo version)- sung by Gonzo (When he's singing the part where Elphaba is supposed to fly, he uses a jet pack and a broom to pretend he's Elphaba. At the near end of the song, the jet pack runs out of fuel and he falls back on to the stage)
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Other songs...........
A Whole New World (from Aladdin)- sung by Gonzo and Camilla
The Leader Of The Pack (by The Shangri-Las)- sung by Miss Piggy or Annie Sue (They'll be backed up by female whatnots in sparkly motorcycle jackets. Miss Piggy or Annie Sue will wear an outfit reminiscent of the 50's (Yes, with a Poodle Skirt))
It's Not Unusual (by Tom Jones)- sung by Link Hogthrob
Witchy Woman (by The Eagles)- sung by Floyd backed up by the rest of The Electric Mayhem
Gimme Love (from Kiss of The Spider Woman)- sung by Miss Piggy backed up by a male chorus
I Get Weak (by Belinda Carlisle)- sung by Janice
Pretty Woman (by Roy Orbison)- sung by Floyd or Gonzo (If it's Gonzo, it's probably going to be changed to Pretty Chicken)
And for modern's sake................
Somebody I Used To Know (by Gotye)- sung by Kermit and Miss Piggy (with Marvin Suggs playing the opening xylophone part with the Muppatones)