Song", sung by Ernie (Jim Henson) and Bert (Frank Oz), written by Joe Raposo. "Imagine If You Would (A Ship Inside Your Mind)", sung by Prairie Dawn (Fran Brill) to Captain Shnook and Mr. Shneeze (both respective parodies of Captain Hook and Mr. Smee from Peter Pan, performed by David Rudman and Jerry Nelson, respectively), aired in episode #3069, music by Jeff Moss and lyrics by Joey Mazzarino. "Imagine That", sung by Ernie about things that he sometimes imagines to be, written by Jeff Moss "In and Out Crowd", a spoof of "The In Crowd" animated by Sally Cruikshank, music by Christopher Cerf, and lyrics by Sarah Durkee. "In and Out Disco" A Monster Disco segment where Frazzle learns to dance in the In Doors and out the Out Doors. "In My Book", sung by Jerry Nelson over animation of a boy reading his book, written by Jeff Moss; it was later sung by Bert (Eric Jacobson). "In The Library", sung by David (Norman Calloway), written by Joe Raposo. "In Your Imagination", sung by Elmo, written by Christopher Cerf. "Indian U Call", sung by Nelson (Steve Whitmire) and Jeanette (Karen Prell) to the tune of "Indian Love Call" by Nelson Eddy and Jeanette MacDonald, written by Lee Pockriss and Judy Freudberg. "Infinity (That's About the Size of It)" sung/written/animated by Bud Luckey. "It Ain't Heavy, It's My Feather", a spoof of "He Ain't Heavy, He's My Brother", sung by an animated chicken (Ivy Austin). "It's Alive", sung by Kermit the Frog (Jim Henson) of how one can tell what is alive and what's not, written by Joe Raposo (music) and Luis Santeiro (lyrics). "It's Funny", sung by an Anything Muppet guitarist joined by other laughing Anything Muppets, later sung by Polly Darton (Fran Brill), music by Sam Pottle and lyrics by David Korr. "It's Hip To Be a Square", a spoof of Huey Lewis And The News' "Hip To Be Square", sung by an animated red square (Paul Jacobs). "It's Nighttime", sung by Maggie Rogers, written by Christopher Jackson (actor). "It's Ookyook (It's Cold Outside)", sung by an Alaskan girl dressing up for winter, written by Joe Raposo. "Italian Street Song", sung by Placido Flamingo (Richard Hunt) and the All-Animal Orchestra. Conducted by Seiji Ozawa. From the operetta Naughty Marietta by Victor Herbert. "Jellyman Kelly", sung by James Taylor and a group of kids, written by James Taylor and Sarah