Jack Osbourne is eyeing a celebrity spin-off for his hit extreme sports show Adrenaline Junkie. The former reality TV star has already extended the programme's format to help mentor a group of troubled youngsters, but now he's setting his sights on showbiz recruits. He says, "It'd be fun to do one with the stars. "But I wouldn't take any annoying people. They'd have to be fun characters." At the top of Osbourne's wish list is pop hunk Justin Timberlake.