CROUCHING in a dark corner, Lindsay Lohan is poised to inject herself with what appears to be a syringe of heroin.
Our shocking picture shows the troubled Mean Girls star wrapping a tourniquet around her lower arm - the method addicts use to raise a vein.
Her right hand hovers the needle over the skin of her left arm.
In other exclusive images, apparently taken at a sleazy Hollywood bash, she snuggles up to party pal Paris Hilton before sharing a passionate kiss with her fellow wildchild.
Our horrifying revelations will compound fears about the extent of LiLo's breakdown - as she was returned to jail this week for a third time. Lohan, 24, was released yesterday following her 15 hours behind bars after posting £190,000 bail.
This was a result of her failing a court-ordered drugs test for cocaine, which was in breach of her probation stemming from a 2007 conviction for drink-driving and cocaine possession.
This is the first time there has been evidence that Lohan may have been dabbling in harder drugs like heroin, which is commonly injected.
Our source said: "These images of her with the syringe are terrifying."
In the startling new photos, the Hollywood hellraiser appears to play with the tip of the drugs needle - and then plays with heiress chum Paris.
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*mods I know you don't like things tagged with x17 on here but OMG