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Poor Mischa!

Mischa Barton's week has been more dramatic than Marissa Cooper's. On Sunday, she got into a fender bender while driving BFF, Nicole Richie's car. (Interestingly enough, the accident was in the same car that Nicole got her DUI in. Coincidence?) But that's not all! Mischa has also had to deal with her little sis, Hania entering rehab for her addiction to prescription painkillers. A family source tells Celebrity Babylon that 19-year-old Hania was getting "out of control." (Seriously, what is with the rehab thing lately? At least Hania is going for a legit reason.) On the bright side, The O.C. had its series finale this week, which we're sure gave Mischa a little ego boost -- the show couldn't go on without her!