Breaking: Lohan uses four letter words!

Lindsay Lohan tossed a four-letter expletive at fellow Hollywood run-around Paris Hilton earlier this week.

In a video posted Thursday on YouTube.com, Lohan was captured leaving a Los Angeles hotel inside which Hilton had reportedly been partying. The 20-year-old actress, as she was getting into the passenger side of an SUV, used the profanity to describe Hilton after an observer asked if they'd fought earlier.

"She's kidding," a friend in the back seat quickly followed up Lohan's sniping.

When asked why she used the word she did, Lohan backtracked: "I never said that. Paris is my friend ... No, I love her."

The car then sped off into the night.