Megan Hauserman claims Sharon Osbourne attacked her during a taping of the show's reunion special back in December and she had to be hospitalized because of the fight.
Megan filed the lawsuit yesterday in L.A. County Superior Court and is suing "for battery, negligence and infliction of emotional distress."
"It's pretty hard to deny what happened on the video," said Ms Hauserman's lawyer Warren J Binder.
"We look forward to our day in court," he told the Associated Press news agency.
There's nothing like a good old-fashioned catfight to stir up controversy and raise ratings. And the moral of the story is...Don't mess with Sharon!