Ex-Baywatch star Michael Bergin was arrested Friday night and charged with felony DUI, TheSmokingGun.com reports. Cops picked up the 35-year-old after he allegedly plowed his SUV into a female roller skater, then refused to take a sobriety test. Bergin made headlines last spring by publishing The Other Man, a trashy tell-all best-seller about his supposed affair with Carolyn Bessette Kennedy. Coincidentally, his July 16 arrest fell on the fifth anniversary of the plane crash that killed Bessette Kennedy and husband JFK Jr. This weekend, Bergin spent about 11 hours in police custody before posting $50,000 bail. The skater, meanwhile, went to L.A.'s Cedars-Sinai Medical Center, where she's expected to undergo knee surgery.