Lindsay Lohan was back at work Friday just nine days after checking into rehab. "She is doing fine right now," said Lohan's publicist. "She is allowed to work, and thens she returns to treatment at night." Production on her new film, I Know Who Killed Me, was halted when the Mean Girls star had her appendix out, and was further delayed when Lohan admitted herself to LA's Wonderland clinic. The star's rep says her client will continue receiving treatment at the facility, but insists, "She is not in some sort of lockdown." Lohan was spotted flexing her shopping muscles at Dior over the weekend.