28. Mischa Barton
The former O.C. actress had a few brushes with the law. She was arrested for suspicion of driving under the influence, possessing marijuana, and driving without a valid license in 2007.
In 2009, Barton was involuntarily held by a psychiatrist after seeking medical attention for a tooth infection. On the issue she said, "If they feel you are depressed or a danger to yourself they can hold you on a 5150. I am terrified of needles and they wanted to pump me full of drugs and I said, 'No, absolutely not. I don't want to be here,' and got into a fight with the nurses, and that led to my 5150."