05/31/2007 AT 12:00 PM EDT
Before she entered rehab on May 28, it looked as if nothing – not a car crash, a drunk driving charge or even sheer burnout – could derail Lindsay Lohan's notoriously high-velocity life. Kicking off the holiday weekend on May 25, the actress and a posse of pals turned up at Hollywood restaurant and lounge Les Deux, where she smoked, chatted with fellow club-goer Paris Hilton and danced to the indie-rock playlist until closing time at 2 a.m. Says an observer: "She was in the middle of the table, laughing and trying to be noticed the whole night."
Lohan, who at 20 is underage, was about to attract a much more serious kind of attention. Following a 5:30 a.m. crash in which her Mercedes struck a curb on Sunset Blvd., she was arrested and cited for driving under the influence. After being hospitalized for minor injuries – and after police said they found a substance tentatively identified as "a usable amount" of cocaine in connection with the accident – Lohan headed out just one night later. The destination? A private bash in a poolside room at the Hollywood Roosevelt Hotel, where sources say drugs were openly used. This time, the revelry ended with the paparazzi photographing a listless Lohan being driven away.