Former O.C. star, Mischa Barton, was arrested last night in West Hollywood, California. Barton was pulled over after police saw her “straddling two lanes of traffic” and change lanes without signaling at around 2:45 a.m. In addition to being charged with suspicion of DUI, Barton, was also charged with driving without a license. Reports also indicate she was charged with possession of a controlled substance. Barton was arrested, booked and released this morning at 10:00 a.m.