Lindsay Lohan is reportedly planning to check into rehab this afternoon after a wild weekend of partying, which included a car crash, an arrest and a drunken public collapse.

After her car crash and arrest in the early hours of Saturday morning, Lindsay had been partying at Teddy’s on Sunday night before leaving around 4.30am on Monday morning. Lindsay’s friend and designated driver Samantha Ronson drove the pair to a nearby petrol station where Lindsay was snapped falling to her knees and then being helped back into the car - where she instantly passed out.

An onlooker told the Mirror: “Lindsay looked exhausted. She’d been out all night and was all over the place. Her arrest clearly hasn’t put her off partying.”

A source close to Lindsay told In Touch magazine that this weekend’s antics have shown Lindsay that she needs to head back to rehab - just three months after completing her last stay: “She finally realizes it’s the right thing to do. She is going willingly.”

“It’s a tough time for her right now. Everyone is hoping that this is a learning lesson to all.”

The source added that rather than returning to Wonderlands - where she spent a month at the start of the year, Lindsay will check into Britney Spears‘ former clinic, the Promises Treatment Center in Malibu.

UPDATE: TMZ is reporting that Lindsay’s lawyer Blair Berk drove her to Promises yesterday and Lindsay has checked into residential, “serious medical treatment program” for at least 30 days.