Justin Timberlake has issued a warning to rival heartthrobs Brad Pitt and George Clooney - he's still the sexiest man in the world. The pop star-turned-actor was recently named King of Sex by Rolling Stone magazine, and he insists that trumps Clooney and Pitt's poll-topping achievements. Timberlake, one of Barbara Walters' 10 Most Fascinating People of 2007, told the U.S. TV queen, "I'll hold onto that title for as long as I can. "Brad, George, you guys may be on the most beautiful whatever but uh... eat your heart out boys."