Days after being cited for driving under the influence, Lindsay Lohan has checked into rehab, a family source confirms to PEOPLE.


This is the second time this year that the 20-year-old star has been in a treatment facility. Her first stay, at the Wonderland Center in West Hollywood, started on Jan. 17.


This time, TMZ.com reports that Lohan has entered Promises treatment center in Malibu. The decision to enter a program comes in the wake of Lohan being cited for DUI after a car accident in Los Angeles. On Saturday morning around 5:30 a.m., Lohan crashed her 2005 Mercedes SL-65 convertible into a curb and shrub on Sunset Boulevard. Lohan, who had left the scene by the time police arrived, was hospitalized for minor injuries. Two passengers were not hurt.


Rather than keep a low-profile after the accident, on Sunday Lohan attended a Memorial Day pool party for 944 magazine at Hollywood's Roosevelt Hotel. Early the next morning, photo agency X17 snapped pictures of the Mean Girls star apparently asleep or passed out in the passenger seat of a friend's car.





One source close to Lohan told PEOPLE over the weekend that friends were hoping she would again seek treatment.

"I think she'll have to do a real rehab this time, and not just a Hollywood rehab."