She dips her finger in and shoves the substance up one friend's nose before snorting some up her own.

And this was filmed just 20 days after she proudly emerged from therapy.

According to Page Six, Lohan entered after she passed out in the hallway of the Beverly Wilshire following Prince's Golden Globes after party there. A spy for Us Weekly confirmed that Lindsay "was totally out of it" at the party.

Lindsay, booked herself into the Wonderland treatment center in Los Angeles earlier this year saying she wanted to get off booze.

At the time Lindsay made a statement to the press that read, "I have made a proactive decision to take care of my personal health. I appreciate your well wishes and ask that you please respect my privacy at this time."

Her mother responded with her own statement: "I'm so proud of her. She's really in a good place right now, spiritually and mentally. She's in an amazing, phenomenal place. She's 20 and she's solid, and she's doing what she needs to do. I don't know that many people who are that secure. It's all about her, and getting back on track. She's fine - she's amazingly fine."

Lohan checked out after a month and was back doing drugs at a Hollywood party within a week.

Her friend said: "That night I saw her do more than 20 big lines of cocaine. She was still up doing drugs at 11am even though she had started about 8pm the night before.

"She wasn't even trying to hide it and was blatantly doing it off table tops, keys, books and in the wardrobe, where she was hunched over with her legs crossed almost bent in half doing it off some magazine on the floor.

"I remember looking at her and thinking how pathetic she looked and how out of control she had become.

"When she is on coke, which is most of the time, all the attention has to be on her.

"I have lost count of the number of times I have watched as she stripped naked in front of everyone.

"Then she loves to check herself out in the mirror as she parades around with her boobs hanging out.

"One night we had gone back to her place and, as always, as soon as she walked through the door she stripped down to her thong, bent down and snorted cocaine off her coffee table and then off her toilet seat."

"Going to rehab was all for publicity. She wanted people to see her seeking help but it hasn't got her off the drugs at all.

"In an average night Lindsay will do two and half grams of coke on her own.

"She doesn't buy it—she is given it by friends and acquaintances, and it turns her into an angry monster. I have watched many a time Lindsay treating her staff like cr*p."

Her friend is convinced that if she does not tame her wild ways she could meet a tragic end.

"That's why I'm showing this video," she added. "So the world can know what Lindsay has been doing and she can't lie about it to herself or anyone else."