Sam Ronson Arrested for DUI

Lindsay Lohan's ex lover Samantha Ronson popped for DUI in California.

Sam Ronson was arrested this morning for DUI outside Baker, California -- home of the world's biggest thermometer --TMZ has learned.

According to the booking sheet, 33-year-old Ronson is listed as 5'7" and 102 pounds.

Law enforcement sources tell TMZ, Lindsay Lohan's ex-girlfriend was driving home from Las Vegas at 10:30AM in her black Porsche when she was pulled over for speeding.

We're told she was given a field sobriety test and didn't perform well. She refused to submit to a breathalyzer and was arrested on the scene.

She was transported to the Baker substation, where we're told she blew over the legal limit. According to sources, she was cooperative the entire time.

Sam DJ'd last night at the Lavo nightclub in the Palazzo hotel in Vegas.

Jacked from TMZ