Madonna is set to team up with controversial artist Marilyn Minter for a top secret collaboration.
The pop superstar has added one of Minter's photographs, of a giant pair of pink lips, to the backdrop of her ongoing Sticky & Sweet world tour and has requested a meeting with the New York-based artist.
Minter, who is known for erotically-charged style, admits she has agreed to work with Madonna - but the project is so secret even she doesn't know what the Holiday hitmaker is planning.
She tells the New York Daily News, 'She wants to come by my studio, so I guess I will find out then. Maybe she wants me to photograph her, or to work on a video.'

Source: ContactMusic