Mischa Barton (back seat) leaving the West Hollywood Sheriff's Station yesterday

According to a "West Hollywood police source" Mischa Barton had weed and pills on her yesterday morning when she was arrested for DUI. TMZ says:

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! Barton was popped at 2:45 AM Thursday in West Hollywood. Cops pulled her over after they witnessed her "straddling two lanes of traffic and failed to signal when making a turn." (Source)

ischa blew a .12? Sounds to me like she was doing it wrong. If she really wanted to get out of the arrest, she should have blown a "5-0". How do you think Britney Spears has never gotten a DUI? Scene plays out the same every time. Britney's asked to walk in a straight line and count down from 20 in increments of 2. By "16" the officer's zipper is down and by "8" she's being told she can drive home as long as she doesn't hit too many more stop signs.

Mischa Barton mug shot