Sex book (1992)

Having been effortlessly controversial through the 1980s and early 1990s, Sex was the first indication Madonna might be trying a little too hard to shock.

Featuring full-frontal nudity and graphic depictions of S&M, there was very little to get genuinely excited about until it transpired that Vanilla Ice wasn't in there for a laugh, he was actually going out with Madge!

20 years later, we still can't quite believe that.