The images, taken during a shoot for W magazine three years ago, show the then-50-year-old Material Girl with no make-up, in a blonde wig, black knickers and a transparent, skin-coloured bra as she sits on a couch, reports dailystar.co.uk.
Another photograph shows her topless reflection in a mirror as she changes into a strappy black dress.
The photographs leaked Thursday were snapped as Madonna prepared for a photoshoot with her then-lover, model Jesus Luz, in a hotel room in Brazil.