Someone commented to me as well about the whole notion of the nuns all of a sudden being able to sing in Rase Your Voice. And, My thought was, isn't it okay ofr a musical to have a song that shows a lengthy amount of time pass through the course of one song?
I didn't see a plot whole with them using one song to show something that happened over the course of several scenes in the movie.
Also, with regards to the rights of the music. I was under the impression that all of the music was owned and copyright by Motown and they didn't give the OK to use their songs in the show.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll