By DAVID K. LI and SELIM ALGAR
June 29, 2007 -- "Mean Girl" Lindsay Lohan was fully loaded on more than just booze when she went on a Memorial Day weekend-long bender - she also had cocaine in her system, according to reports.
Cops said they found traces of blow in Lohan's blood on May 26, the day she crashed her luxury ride in Beverly Hills. Previously, they said they found a personal-use amount of the drug in her car.
Lohan, who turns 21 on Monday, checked herself into rehab several days after she slammed her 2005 Mercedes SL-65 into a Sunset Boulevard curb.
The troubled actress hit rock bottom 48 hours later when she capped off her wild Memorial Day holiday by passing out in a car outside Hollywood's famed Roosevelt Hotel.
Snapshots of the unconscious red-haired temptress made front-page news around the world, and she checked into Promises drug and alcohol rehabilitation center in Malibu a day later.
Officers found cocaine in Lohan's smashed-up car, and a news report yesterday revealed that the actress had traces of cocaine in her system.
A Beverly Hills police spokesman declined to confirm or deny the bombshell revelation.
Reports also said Lohan was twice over the blood-alcohol limit for drunken driving. Detectives are about to turn over their findings to the Los Angeles DA.
"I'm not going to tell you one thing or another. We're basically in the home stretch of the investigation and it'll be completed very soon," said Lt. Mitch McCann.
McCann said she was charged with driving under the influence, and "we recovered some cocaine from the car and booked that into evidence, but she was not charged" yet with cocaine possession.
Lohan's spokeswoman and mother could not be reached for comment.