Two years ago tennis player Maria Sharapova signed with Tiffany & Co. Since then she has worn a variety of Tiffany & Co. diamond earrings out onto the court. For this year's U.S. Open she is wearing yellow diamond drop earrings that feature both yellow and white diamonds set in 18 karat gold and platinum. "Wearing Tiffany diamonds on or off the court is always a special experience," Sharapovasaid in a press release. "The addition of colored diamonds makes the jewelry even more extraordinary." The earrings sell for $16,100.