Lindsay Lohan is crazy. We already know this. Plus, when you add an intoxicating substance of any kind, the craziness multiplies.

The reports have been trickling in this week of Lindsay’s NY weekend with girlfriend Samantha Ronson.

From what sources are saying, Lindsay fell off the wagon like it was no big deal. Saturday while night Samantha worked at NY’s Hawaiian Tropic Zone Lindsay hung out behind the DJ booth in a VIP table - drinking Grey Goose/Red Bulls.

But the real action took place Friday night at the Beatrice Inn, where Ashley Olsen thought she would say hello to Samantha.

Lindsay, who has always been a super territorial bitch, wasn’t happy about Ashley talking to her woman so she went off on the pint-sized star.

A source told the NYP, “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!’ ”

Some reports have suggested that Ashley was trying to warn Sam to get away from crazy Linds, but I doubt that actually took place. Unless Ashley wanted to be on the receiving end of a beat down. Or maybe that’s why Lindsay blew a gasket?

Regardless, this is been about the only juicy news about Lohan in months. Is it bad for me to say “Hooray, the trainwreck is back!”?

(*Bonus - Check out Lindsay Ronson’s Facebook profile)