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Robert Downey Jr.'s career has been on the upswing ever since he kicked his nasty habits back in 2001, but 2008 couldn't have been any kinder to the 43-year-old hottie. With "Iron Man" pulling in over $580 million, a potential Oscar nom for his hilarious turn in "Tropic Thunder," and the lead in the upcoming "Sherlock Holmes" flick, the former felon is now Hollywood's most wanted man.