The Rolling Stones' songs are in many movies, but not Baz Luhrmann's 'Moulin Rouge!' A controversial Rolling Stones track was supposed to serve as a villain song in the movie.
John Lennon's music has inspired many people to live better lives. That doesn't mean he wanted to get onstage and do a charity concert with The Rolling Stones' Mick Jagger.
Classic rock and Broadway music sometimes overlap in amazing ways. For example, Queen's Brian May once played guitar on a version of "Defying Gravity" from 'Wicked' that is incredible.
One of Cat Stevens' songs is a rewrite of a Christian hymn. That's very interesting, considering that Stevens is now one of the only Muslim celebrities in the Western world.