Credit: SBSD/Splash News Online

What's there to be smug about?

Wearing a striped tee and minimal makeup, Samantha Ronson cracked a slight smirk in her just-released mug shot. The 33-year-old DJ was arrested Monday at 10:31 a.m. outside of Baker, Calif. for driving under the influence.

Officers pulled over Ronson's black Porsche Targa when they noticed her driving 19 miles over the 70 m.p.h. speed limit.

"Speed was why she was stopped, but she was arrested on [two] misdemeanors of driving under the influence," an officer told Us Weekly. "When she was stopped, she showed signs of being impaired. [The officer] gave her balance tests and she showed signs of alcohol intoxication."

Ronson, who famously dated Lindsay Lohan from 2008 to 2009, was alone at the time of the arrest. "She was friendly and talkative," an officer said. "She was cooperative throughout the whole ordeal."

The DJ "admitted she had consumed alcohol early [that] morning or late last night, and was on her way home [from Las Vegas]" according to an officer. "She went to bed and got up this morning and was on her way home."

Ronson was released from the San Bernadino Sheriff's office at 5:30 p.m.