See which troubled stars have made headlines for their outlandish behavior
Robert Downey Jr.
The former drug and alcohol addict spent several years checking in and out of rehab in the '90s. Now sober, the Iron Man 2 star told Playboy in November 2010 that it feels like a "lifetime" since he succumbed to his addictions. "Looking back, I think, 'Oh my God, I could have been done,'" he said.
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