The Mean Girls actress was jailed on Friday (24Sep10) for failing two drug tests and violating her probation, but she was allowed to walk free after posting $300,000 (£200,000) bail following a successful appeal by her lawyer Shawn Chapman Holley.
But the star has been hit by yet another scandal following the publication of photographs in Britain's News of the World, which purportedly show Lohan posing suggestively with a syringe. In one snap, a woman believed to Lohan points the syringe towards her arm while looking into the camera.
In other pictures, believed to be taken in 2007, she is purportedly seen kissing former pal, and fellow troubled socialite, Paris Hilton - who was handed a one-year suspended sentence earlier this week (begs20Sep10) after she was caught with cocaine in Las Vegas last month (Aug10).
A source tells the publication, "These images of her with the syringe are terrifying... What no one knows for certain is just how often Lindsay does drugs - or exactly which drugs she does.
"Lindsay has made no secret of her drug addiction. People are used to seeing her off her head (high)."