Fresh out of the fire from her recent provocation of French political leader Marine Le Pen, Madonna continued to court controversy on her MDNA world tour, flashing her nipple at an audience in Istanbul, Turkey on Thursday night. The 53-year-old icon began her performance of "Human Nature" by whipping off her shirt. The video of the performance shows that the subsequent exposure of her breast was entirely deliberate, as she tugs down her bra and shrugs at the roaring crowd.