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Ty Murray is known as the King of the Cowboys. He's the only seven-time All Around Rodeo Champion and is regarded as the Michael Jordan of his sport. But now he's taking on his greatest challenge -- teaching nine celebrities to ride a bull.

Murray is bringing nine stars from the entertainment and sports world to his sprawling 2000-acre ranch in Stephenville, Texas, for an intense bull riding boot camp. The celebrities will be taught the techniques and toughness it takes to survive riding an angry 1,800-pound bull.

Bull riding has been described as the world's most dangerous sport, and no one knows what will happen when these celebrity novices try their hand at one of the toughest challenges known to man. Some of the celebrities may chicken out, while others may be sidelined by injuries.

The nine courageous guys who are stepping up to take on the challenge are musician Vanilla Ice, actor Stephen Baldwin, actor/musician Leif Garrett, actor Dan "Nitro" Clark, actor Francesco Quinn, former football star "Rocket" Ismail, Ultimate Fighter Josh Haynes, X-Games motorcycle legend "Cowboy" Kenny Bartram and Survivor reality star Jon "Jonny Fairplay" Dalton.