Diamonds aren't just a girl's best friend. It seems like all celebs -- male and female -- have a penchant for these shiny stones. Who's the blingiest of them all? See who rocks April's birthstone best.
Best Bling: Custom-designed Harry Winston tennis bracelet, worth $29,000
While playing in a particularly intense set during the 2004 U.S. Open, Serena lost one of her $40,000 diamond earrings when it fell out of her ear and onto the asphalt. Oops! Fortunately, it was retrieved.