Actress and model Lauren Hutton, 55, is in serious condition this morning, being treated in Las Vegas's University Medical Center for multiple leg fractures, scrapes and bruises following a motorcycle crash that occurred yesterday during a 100-mile group ride with other celebrities near Lake Mead. Also along for the ride were Dennis Hopper and Jeremy Irons, who were not injured. Hutton, on hand to help launch a new art exhibit at Vegas's Venetian resort, apparently ran off the road and crashed. The cause of the accident is now reportedly under investigation. The National Park Service announced that she was wearing a protective helmet. Before hopping on her motorcycle, Hutton said she'd been riding two-wheelers long before she ever bought her first car. "I love the feeling of being a naked egg atop that throbbing steel," she told the Las Vegas Review-Journal. "You feel vulnerable but so alive."