Some of the musical aspects need work, but it seems like it's going to be a beautiful ballad. This is true innovation at its finest I believe. Problably gonna be some great visual aspects that they'll add in also. It'll be interesting to see the finished product.
1. Santa Clara Vanguard - Phantom of the Opera 1989
2. Phantom Regiment - Defiant Heart: The Music of Dmitri Shostakovich 1996
3. Spirit of Atlanta 1980 (This may not count because never seen the show, just heard it)
Technically it doesn't close the case because that urban myth was about shrinkage.
Actually I think parents of teenagers everywhere would want kids to drink something that would kill, as euro_euph06 put it, your "king's army" count thereby eliminating unwanted teen pregnancy.
How's that for G-rated?
(I'm sure it isn't true, but it's still amusing anyways)