Explicit photos of 18-year-old Queen of Pop, Madonna are now up for auction

Queen of Pop, Madonna took some nude photos when she was just 18 years old and they're about to be auctioned

off now that she is 59. Read TMZ's report.

Gotta Have Rock and Roll -- the same guys that had Tupac's confession letter to M -- will auction off a bunch of Madge's earliest known original nude pics with original negatives and copyrights.

To be exact ... 108 images and each with an opening bid between $8k and $12k.

The pics show Madonna at the Art World Institute of Creative Arts where photographer Cecil I. Taylor got behind the lens. Madonna met the photographer when she lived in Ann Arbor, Michigan.