Linday Lohan and Michelle Trachtenberg had a huge bust up at Miami Beach's Shore Club reports Star.

A source tells Star:

Those two hate each other, and Lindsay started screaming, 'Get her the [bleep] outta here!

an "eyewitness" told the tab.

She was threatening to get physical and actually fight Michelle, saying, 'I'll kick her [bleeping] [bleep]!

Lohan reportedly left Shore Club shortly after the outburst.