I've never seen the behind the scenes thing...just a video of one of the concerts themselves that members of the Fan Club got (I had some friends who were members and we'd have sleepovers just watching eps that hadn't aired in Germany yet *lol*). I rather liked the songs. Best part is when Shredder, in his quest to destroy all music, tests out his music destroying machine by destroying a NKOTB album and turning it into confetti.
Believe it or not but COOTS is a Platinum Award winning album....seriously... Their Christmas thing...well I've only ever heard the songs from it but Michelangelo singing Opera music is just wrong.... The follow up album to COOTS, Getting Down In Your Town, is ok from the couple songs I've heard from it. Casey Jones toured with them instead of April for that one I believe. And then they did their stint at Disneyworld...where they had a musical show....
The Turtles have several of Pizza related songs of course:
Pizza Power
On Top Of The Pizza (a rather gross song IMO)
Pizza U.S.A