Kristin Davis
Believe it or not, the overly sweet Sex and the City star struggled with alcohol abuse so much that she didn't think she'd make it past the age of 30. "I realized it was not going to end well. I got into the acting program, it was very challenging, I was hungover and I wasn't doing so well in my classes. I thought, 'Do you know what? It's going to be one or the other. I can't really have both.'"
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