Lindsay Lohan fans got more than they bargained for when the sometime actress took part in a PR stunt at Millions of Milkshakes in Los Angeles on Thursday.

As well as handing out her own custom milkshake, she also dished up a serving of unflattering sideboob.

Even donning an apron failed to prevent her gaping cotton dress from revealing she'd stepped out braless again.

Still, her indecent exposure didn't seem to harm demand for the 'Lindsay Lohan Shake,' and the Mean Girls star was kept busy behind the counter.

Lindsay's dessert - which has been added to the menu - features swirls of vanilla and chocolate ice cream, and Oreo cookie crumbs.