Mischa Barton got her New Year’s celebration on early by lighting up late last week, which subsequently resulted in her arrest. Here is an update on Mischa that our buddies at TMZ reported regarding Mischa, her drugs, and alcohol:

A West Hollywood police source tells TMZ that when she was arrested, Mischa Barton blew a .12 on her breathalyzer test, smoked marijuana that day (which cops found) and had prescription drugs in her possession — that weren’t hers!”