First it was Sylvester Stallone. Now Madonna appears to be the next superstar moving out of her Florida digs. New York’s Daily News reports that Madonna’s friend Rosie O’Donnell is buying the singer’s $6 million mansion in ritzy Biscayne Bay. A spokeswoman for the talk show hostess would not say if the deal was done, just that talks were under way. “It looks like she is going to buy it, but I don’t know for how much,” said Rosie’s publicist Jennifer Glaisek. Madonna’s property on well-to-do Brickell is just south of downtown and north of Coconut Grove.