...and not in a good way!

Last night Lindsay Lohan went to the Chateau Marmont, and then she headed to Sam's pad, at which point photographers heard screaming and banging noises!

What could these two possibly be fighting about? Poor Lindsay just had her house broken into, so you'd think Sam would take it easy on her! After a few minutes of hollering, the squabbling seemed to stop, but then Lindsay called the cops on photographers!

Ahhh, the drama never ends...