Madonna. Picture: Instagram

Naked pictures of Madonna when she was 18 years old are going up for auction, each with an estimate of between R11 241 and R16 862.

The X-rated snaps show the superstar singer when she was 18 years old at the Art World Institute of Creative Arts, where photographer Cecil I. Taylor snapped the star, who is now 59, performing various ballet poses, a number of which show her without any clothes on.

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The 108 pictures are up for sale with original negatives and copyrights on online auction site Gotta Have Rock and Roll as part of The Rock & Roll Pop Culture Auction, which is due to open on Wednesday at 9am EST, and ends on December 1.

A listing on one of the pictures on the site states: "This original, never-before-seen nude photograph of Madonna was taken by Cecil Taylor in 1977 at the Art Worlds Institute of Creative Arts in Ann Arbor Michigan.

"Madonna was 18 and a student at the Institute, still living in Ann Arbor Michigan, before she moved to New York City. The 4 x 6 original print comes with the original 35 millimeter negative. This photograph was shot in a series that is the earliest known nude photographs of Madonna. Very good condition, stamped on the verso by the photographer.

"The original photograph and negative come with a copy of Madonna's signed release as well as a bio of the photographer and information on the Institute. The seller is transferring copyright. Also comes with a Gotta Have Rock & RollTM Certificate of Authenticity. (sic)"

Each of the nude Madonna pictures has a minimum bid requirement of R7 025.

The singer and the photographer's signatures are on the model release form, dated May 19, 1977, which can also be purchased. 

Other Madonna-related lots available include a number of "handwritten to-do lists" penned by the 'Like a Prayer' hitmaker for her personal assistant Melissa Crow.