What's Wrong With Lindsay Lohan's Face?

Dina Lohan, Calum Best and Lindsay Lohan

Lindsay Lohan hosts Nylon Magazine and DKNY Jeans Present Nylon Magazine's Young Hollywood Issue. I wonder if something happened that night? Could it be that her ex boytoy Calum Best was at the same party? I don't think that's the reason since she's all clinging to him but she looks pretty pissed about something.