Isn't that the model who cut her own throat while at a night club? I think she's on drugs.
Eta:
Yeah that's her, there was a blind item saying onlookers at Kate Moss' party were horrified when a model who looked a little worse for wear stood up and cut her neck for no apparent reason...then the article below came out
http://www.dailymail.co.uk/tvshowbiz...ok-launch.html
Not sure if the blind item ever confirmed it was her, but it was pretty obvious.