Musician Billy Joel sold his Miami Beach waterfront mansion for $13.75 million. The home on exclusive La Gorce Island has 7 bedrooms and 8.5 bathrooms. ONE Sotheby's International Realty was involved in both sides of the transaction. The 8,881-sq. ft. home has "breathtaking" views of the bay with 165 feet of water frontage. It has a pool, bar with wine cellar, gourmet chefs kitchen, formal living and dining room, and an office. Built in 2004, the Mediterranean-style home has an elevator and built-in exterior grill.