Samantha Ronson smirks in DUI mug shot

Samantha Ronson gives it large in her mug shot / San Bernardino County Sheriff's Office / Getty
We've seen plenty of celebrity mug shots over the years, but Samantha Ronson's has to be the smirkiest we've ever seen. Talk about showing your emotions on your face!

Lindsay Lohan's ex was arrested for drinking under the influence at 10.30am on Monday after she was pulled over for speeding in California.

She was taken to the San Bernardino County Sheriff's Office where her booking photo was taken.

The DJ-ing sister of Mark Ronson is said to have been on her way home from Vegas the morning after playing a gig at Lavo in the Palazzo Casino, the Daily Mail reports.

We're pretty sure you're supposed to look sheepish and ashamed in these kinds of pictures. Assume SamRon didn't get the memo...