Apparently being a sober is a part time thing for Lindsay Lohan. She was seen pounding down shots of vodka cocktails on Friday night at the Beatrice Inn while partying with ex-boyfriend Stavros Niarchos and Brody Jenner.

"Lindsay is learning how to work through her addictions and, once in a while, she chooses to have a cocktail," says a friend, attempting to explain.

This is the second 'slip-up' she's had in under a month. There was footage of the 'actress' drinking straight from a champagne bottle on New Years Eve as well. If this is the second time she's gotten caught in just a few weeks I'm sure there's been plenty of times she's gotten liquored up without getting caught.