AceShowbiz -

It's girl fight. Lindsay Lohan and Ashley Olsen are feuding over DJ Samantha Ronson. The actress-singer apparently got very jealous upon knowing that Ashley greeted Samantha during a party at a club in New York this past weekend.

Lindsay and Samantha were enjoying their night-out together at the Beatrice Inn on Friday, April 18 when Ashley greeted Samantha that drove Lindsay mad. A source who witnessed the fight told Page Six, "Ashley Olsen said hello to Sam at the Beatrice, and Lindsay screamed at her, 'Get your 15-year-old 'Full House' ass away from my girlfriend.'"

The following day, while they were partying at the Hawaiian Tropic Zone Lindsay claimed Samantha "was ignoring her" and became upset. "Samantha was really focused on her work and didn't leave the booth for anything," added the source.

Lindsay and Ronson are close friends that once were reported to be dating. They are often photographed together so it's not surprising then that they spark same-sex romance rumors. Despite their denial, Lindsay keeps adding fuel to the speculation of a romance as she's been reported to have created a Facebook profile under the name "Lindsay Ronson."