Playboy's Shannon Twins Injured in Car Wreck ... Kristina Arrested For DUI

Former Playboy Playmates Karissa and Kristina Shannon were rushed to the hospital Monday after a horrific accident where Kristina rolled their SUV ... and then got arrested for DUI.

Sources close to the twins tell us they were on their way to get their nipples pierced (yes, really) when Kristina lost control of their G-Wagon in Beverly Hills. Karissa had to be pulled from the vehicle through the windshield and firefighters cut open the SUV's roof to rescue Kristina.

Law enforcement sources tell us the twins were taken to a local hospital for treatment. Amazingly, they made it out with just scratches and bruises. Kristina was cited for misdemeanor DUI while she was still in her hospital gown.

Sadly, getting wasted in public has kinda become the girls' thing lately.