The Boardwalk Empire star reportedly got into a scuffle at the Stone Rose Lounge bash in New York after she accidentally spilled a drink over her friend, who broke down in tears and refused to accept de la Huerta's apology.
The incident sparked rumours the star was drinking again following her run-in with the law earlier this year (11), when she was sentenced to community service and 12 weeks of alcohol counselling after allegedly punching a partygoer at a Big Apple club.
However the brunette is adamant she hasn't touched a drop since March (11), and blames the dispute on her friend's intoxication and emotional issues.
She tells New York Post gossip column PageSix, ""I haven't had a drink since March 23. I was drinking Coca-Cola. I brought a very good friend to the premiere who's having problems. She got wasted. She lost her wallet and was screaming and wailing and acting irrational. She spilled a drink on herself when I reached over to hold her hand to calm her down. She feels horrible about it. I made the decision to leave. Brett is a dear friend.""