Mischa Barton shows up to bar alone, pukes outside, and then stays to party on

(HMG) – Former OC star Mischa Barton is still sticking to her party girl ways, despite being arrested for DUI in 2007, and being hospitalized on a psychiatric hold last year.  Barton had a rough night over the weekend in Hollywood, as she rolled into Bar Marmont on Saturday alone and looking “totally out of it.” According to a witness at the bar (via Page Six), “A few minutes after she comes in, she runs outside and vomits everywhere. And then she went back inside and hung out for the rest of the night.” Well I suppose you could say she isn’t a quitter, it’s more about which habits she chooses to hold onto.  A representative for the 24-year-old London-born actress choose not to comment.  In 2008 Mischa admitted in a Marie Claire interview, that she went to rehab, reportedly for alcohol and drug problems, and that she had become someone she had detested.  Seems like things haven’t changed much?