Paris Hilton Arrested in Vegas on Possession of Cocaine

but of course (again) it wasn’t hers….

TMZ is reporting:

According to police, Paris was the passenger in a vehicle that was pulled over outside the Wynn Hotel. The driver Cy Waits was arrested for DUI (drug-related, not alcohol) and when cops searched Hilton, they found her in possession of a controlled substance.

Police say tests revealed the substance to be cocaine. She was arrested and released on her own recognizance.

And we’re told, although it’s too early to tell, there might be an issue of — whose cocaine was it anyway? Sound familiar — i.e., Paris’ marijuana issues in South Africa.

Sources who have spoken with Paris since her arrest on the Vegas strip late last night tell TMZ … she insists the purse — with what we’re told contained a small amount of cocaine — was not hers.

You’ll recall Paris used the “the-drugs-weren’t-mine” defense in South Africa last month, after being detained by police. No charges were filed against her.