A nude photograph of Madonna taken by US photographer Lee Friedlander is expected to fetch as much as $15,000 when it goes up for auction at Christie's in New York next month.
Matthieu Humery, head of Christie's photography department, said the picture was "probably the most explicit" of a set taken during a session in 1979, for which the singer was paid $25. Friedlander himself later sold the pictures on to Playboy and they are currently owned by collectors Leon and Michaela Constantiner.
Friedlander said of the picture: "She told me she was putting a band together but half the kids that age doing that. She was a good, professional model".
The photo will be sold along with a number of other images from the Constantiner's collection of pictures of glamour and style icons, which will be auctioned on 12 Feb. Should you wish to know what an explicit picture of a young Madonna would look like (in the name of research, obviously), go here.