In 1972, while touring in North America for Exile on Main Street, the Rolling Stones were accompanied by a film maker named Robert Frank, who filmed their each and every move -- including the band doing lines of cocaine amongst naked groupies backstage.
Once the Stones' management realized that all the band's mischievous activities were being documented, they had the film shut down on legal grounds, and the footage could only be viewed by anyone while Frank was present.
Now, 37 years later, all of the revealing C**ksucker Blues, as it was titled, is available on the world wide web. You can watch it all streaming here. This is NSFW, to say the least. Oh, so NSFW. If you don't know what that means, it means that there's lots of bad stuff in it and don't watch it at the office or with the little ones around.