The "Express Yourself" singer certainly did more than that a few days ago in Turkey!
During a concert in Istanbul, Madonna reportedly intentionally had a nip slip during her 1995 hit, "Human Nature." Dance moves to the number involved a striptaease and then apparently she pulled her bra down to expose her right breast.
According to Fox News, before her Super Bowl half-time show in February, Madonna said there wouldn't be any wardrobe malfunctions, referencing of course Janet Jakson's showcase during the 2004 Super Bowl.
The Material Girl explained, "You don't have to show your nipples to be interesting, and it doesn't necessarily mean you're cutting edge if you do."