Once upon a time they were both drugged up and starving together, two skinny bitches partying all night and loving the attention.

These days, Nicole Richie is living clean, cutting out the viruses that had plagued her previous life – people and substances. One of them: Lindsay Lohan. And like the best Mean Girl ever, Nicole is also trying to convince Samantha Ronson to cut that crank out of her life too.

E! is reporting that Lilo and Sam are done. Again. Apparently Nicole had a party last week and gave Sam firm instructions that Lilo wasn’t welcome. Sam went anyway, Lindsay lost her sh-t. They also had a huge scrap two nights ago after which Sam took off to have dinner again with Nicole.

So f-cking embarrassing.

To go from the popular girl to the stalker girl. The girl no one wants to be friends with. The girl who has to drive from club to club in the middle of the night, asking the paps to help her find the object of her obsession.

This is Lindsay Lohan.

And still, like her mother, there is no end to the shamelessness.

Lilo was in New York yesterday, knowing that we know that she’s been publicly accused of theft after a magazine photo shoot, knowing that we know that she’s been dumped on her sorry ass again, check her out smiling wide for the paps yesterday on a shopping outing with her 13 year old brother.

How convenient.

Lindsay the doting big sister. Because that’s a great birthday present – inviting photographers to come along for the trip.

Photos from Wenn.com and Flynetonline.com and Jackson Lee/Splashnewsonline.com