: I'm The Victim!!! said Lindsay Lohan

Lindsay is squarely disputing the story chemical dependency technician Dawn Holland told TMZ ... that Lindsay attacked her and caused her to sprain her arm so severely she's on workers' comp.  Lindsay says, for starters, she wasn't even with her two roommates hours before the incident.  Lindsay says she was out getting her hair done.

Lindsay says that's when she went inside the house and called 911.As for refusing to take a breathalyzer, Lindsay says she actually asked Holland to give her a test but Holland refused.Lindsay claims there were not only witnesses that saw everything ... there are surveillance cameras to prove her story.