Joel Ryan / Invision/AP 1 / 10
Joel Ryan / Invision/AP 1 / 10

Pop icon Madonna is selling off a painting from her personal art collection to help pull in millions for her children's charity.

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The 1921 cubist piece, "Trois Femmes a la Table Rouge" by French artist Fernand Leger, will go on the auction block at a Sotheby's International Realty Affiliates auction in New York on May 7.

The Material Girl's painting is worth up to $7 million, and Madonna has vowed to donate all the proceeds to her Ray of Light Foundation and its education projects in Afghanistan and Pakistan.

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A statement from the singer reads, "I cannot accept a world where women or girls are wounded, shot or killed for either going to school or teaching in girls' schools. We don't have time to be complacent. I want to trade something valuable for something invaluable -- educating girls! Knowledge is power. Let's change the world!"

The 1921 painting, purchased by Madonna at a New York auction in 1990, will be displayed in Hong Kong and London before it returns to the Big Apple to be exhibited in Sotheby's galleries ahead of the sale.

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