Only days after the second season of Fox's The Simple Life 2 resumed filming following a temporary halt resulting from the death of series star Paris Hilton's grandmother, production of the series was once again put on hold when Paris was thrown from a horse during taping and airlifted to a hospital.

Paris and Simple Life co-star Nicole Richie were horseback riding on location at a ranch in Hernando County, Florida when the incident occurred. After first being treated on-site at the rural location north of Tampa, she was airlifted to St. Joseph's Hospital, where she was admitted for observation.

Chris Alexander, a spokesman for 20th Century Fox Television, told Reuters that Hilton was walking around after the incident, "but to err on the absolute side of caution, we made a decision to medevac her." "We're hoping she's fine," he said, then adding, "Whenever you're dealing with talent, you always want to be extra careful."

According to the Associated Press, a nursing supervisor at the hospital said Hilton was expected to be released Friday night. There was no immediate information available as to when filming might resume.

Paris and Nicole began their 30-day cross-country road trip last weekend in Miami Beach and will end it in Beverly Hills. Travelling in a pink pick-up truck with a shiny metallic trailer hitched to the back and with no money, credit cards, or cell phones, the duo are staying with a different host family during every stop of the road trip. As in last season, the girls' local host families will once again have arranged for local jobs for Paris and Nicole, but the girls will be on their own for almost everything else -- including any transportation problems.

By Monday afternoon, Reality TV World had received reports of the "celebutantes" being spotted eating lunch at a local lunch cafe in Brooksville, Florida -- population 7,264 -- where they told locals that they were working at the nearby Weeki Wachee Springs water park.