"Fur" (composed and arranged by Sam Pottle, lyrics by David Axelrod) was composed in 1975 for 4 anything muppets. It was re-recorded in 1997 for Zoe, Grover, Elmo, & Herry.
"Fur" was first shown in season 7 (1975-76) and repeated in seasons 8,9,10, 14,16, and 23. Puppeteers (and voices) were Jim Henson, Frank Oz, Richard Hunt, and Jerry Nelson.
The new version (arranged by Mike Renzi) has the voices of Kevin Clash, Fran Brill, Frank Oz, and Jerry Nelson. It premiered in season 29 (1997-8) and also played in season 30. It was last seen in show 3934 in season 32.
Anything else?