Lindsay LohanDespite friend Samantha Ronson’s efforts, three-times rehabbed Lindsay Lohan was reportedly spotted drinking alcohol in New York over the weekend.

Lindsay’s weekend started at the Beatrice Inn on Friday night where she was said to be acting erratically.

A source told the New York Post that the Mean Girls star reacted badly when Ashley Olsen approached Sam for a chat: “Ashley Olsen said hello to Sam at the Beatrice, and Lindsay screamed at her, ‘Get your 15-year-old Full House ass away from my girlfriend.”

On Saturday, an onlooker at the Big Saturday party at the Hawaiian Tropic Zone told the New York Daily News that Lindsay was drinking Grey Goose vodka cocktails as Sam DJed until 4am: “She was chain-smoking all night [too].”

“Her eyes were a little glassy and she was holding her head in her hands, but she left on her own two feet.”

And according to the Mirror, she was spotted complaining about the effects of partying yesterday.

A source told the newspaper she took a walk through the city yesterday morning with a cigarette, energy drink and firmly planted sunglasses: “She kept telling anyone who’d listen how bad she felt after the weekend.”

Her spokesperson refused to confirm or deny the drinking stories yesterday, saying: “I wasn’t there, so I can’t comment.”

Lindsay spent three stints in rehab last year including a two month stay at the Cirque Lodge in Utah. She has been spotted drinking on several occasions this year but friends claim she is in control of her addiction.