Ok, I've listed to the John Denver & Muppets Christmas CD. It was very heart warming and fun, every track.
"The Twelve Days of Christmas" starts it off just like in the special, though some of the characters have different lines. Like Bunsen and Beaker are on the CD, but not in the special's version. Heh, Richard probably wouldn't like this but I was always a little scared of Beaker as a child lol. Now I just feel bad for him. I noticed recently just how many times Bunsen cleary set up those lab "accidents!" lol
"The Peace Carol" is Scooter's big song with John. Richard had such a good voice :

:. It's very comforting with lyrics like, "The hope that has slumbered for two thousand years, the promise that silenced a thousand fears. A faith that can hobble an ocean of tears, the peace of Christmas Day."
"Little Saint Nick" is the Electric Mayhem's songs, it's really groovy, and Animal always manages to add his own little touches

.
Two different songs have Kermit and John Denver singing about how even if you don't celebrate Christmas, it's enough that you believe in love, which was nice.
Oh and the "It's In Every One of Us" song was indeed on this album. I think someone mentioned this when Amanda asked.
One of my favorites was "Silent Night", because The Muppets sing it in German, and John Denver tells the story behind the song.
And at the end, all the main characters take turns saying Merry Christmas. Very sweet, it really helped me get into the spirit, I'd definitely recommend it! (and it wasn't that expensive on barnesandnoble.com and amazon)