Mischa Barton Still Has A Drinking Problem

It seems as though Mischa Barton's wisdom tooth surgery is still causing problems for the train wreck.

Her friends had been speaking out about how worried they were about her drinking problem earlier in the summer, and it sounds as if she's still hitting the bottle hard. Mischa was seen looking a bit tipsy at the G-Star after party at the Bowery Hotel.

"She kept saying, in a really spacey, weird British accent, 'Like, I'm with the deejay. I to tally know the deejay. I'm here for the deejay,' " laughs our spy. "She was slurring her words." After being let in, we're told that Barton "needed to be escorted to the deejay booth" where she proceeded to "stand for about an hour, dancing in her own world. I don't think her eyes were open to full capacity -- or even half capacity -- the whole time she was there."

This chick is going to keep spiraling downward unless someone sits her down and talks some sense into her. Get her *ss in rehab!