There's a few clips with Little Jerry and the Monotones, which obviously come from the same episode.
http://www.sesamestreet.org/video_p...-2eb2-4a6d-a08a-a6fce2526417/rock_n_roll_star
http://www.sesamestreet.org/video_p...-9b9a-42d3-8bb0-a929f7be603c/big_jeffie_sings
Interestingly, Rockin' Richard and Chrissy aren't included, but the group does include that fat blue anything muppet pictured with Little Jerry and Big Jeffy in the Rock & Roll! video.
And here's another clip which is a bit intriguing:
http://www.sesamestreet.org/video_p...7f-8d58-41e66f72533e/elmo_sings_ooh_wah_ditty
That one is obviously from a different episode (David appears in the other two clips, Mike appears in this one, and I don't think the two were ever on the show at the same time). It has Little Chrissy and Big Jeffy teaching Elmo to sing with them. But at the end Chrissy refers to the group as "Little Elmo and the Monotones". Makes me wonder if the plot invovled Little Jerry and the Monotones splitting up, with the group replacing Little Jerry with Elmo. But Little Chrissy isn't a member of the group (there is a Chrissy in the group, but it's a different Chrissy). But since there are two Chrissy's performed by Christopher Cerf, I wonder if they just used the wrong puppet (they have used the wrong puppets for members of the Monotones before, but I would think the individual names of the Monotones would be a bit obscure for them to use the wrong Chrissy). Since Rockin' Richard is absent, I wonder if maybe this is from after Richard Hunt's death.
Also interestingly is that in this clip, Big Jeffy seems to be wearing the same clothes as in the other two clips I posted in this post. And Chrissy is dressed the same as that other Monotone member who appears in those clips.