Samantha Ronson (Jamie McCarthy/Getty Images for Charlotte Ronson)

The 33-year-old DJ was pulled over for driving over the speed limit at 10:30 a.m. and “showed signs of being impaired,” an officer told US Weekly. She was taken to the San Bernardino County Sheriff’s Department, charged with two misdemeanor counts of Driving Under the Influence and released a little before 6 p.m.

Ronson, who was on her way home from a gig in Las Vegas, is best known for being the ex-girlfriend of Lindsay Lohan. The actress has spent time in rehab, under house arrest and in jail for DUI-related arrests in the past.