What is the name of this movie?

Ok there's probably no hope here but I'll try anyways... There is a movie I watched when I was very young and would like to get a hold of it. It was in the mid 80's when I watched it but the movie could have been made in the 70's sometime. Pretty much the only part I can remember is these...

A movie that came out in late 1980's with a lady who had friends that were weird little dwarfs and an evil guy who turned into a bat would turn things into stone kind of of a snow white movie during the movie I just died in your arms played in it and the dwarfs or whatever were singing in it and...

This is both vague and detailed. I recall seeing this movie, but I never knew the title of it. I think it was a B movie from the late 70s to early 80s (give or take). I remember the movie very well, though I didn't see the whole thing. I know not the title or any of the participating actors. They...