The former model was a passenger in a 2006 Porsche Cayenne when a woman driving a Toyota Matrix smashed into them from behind about 10:20 p.m. Wednesday. The Porsche, in turn, hit the car in front of it. The operator of the Matrix was arrested for DUI after reportedly blowing far above the legal blood-alcohol limit of .08.
Paramedics transported Nielsen to a nearby hospital where she received X-rays and was treated for injuries to her neck and back. She was released and allowed to go home and is "sore and resting," her rep says.
Nielsen, 48, has struggled with her own alcohol abuse and has appeared on Celebrity Rehab with Dr. Drew. According to a 2010 interview, Celeb Rehab producer John Irwin said, "She's sober, and she quit smoking. She's doing crazy good."