Sharon Osbourne has reached an agreement with a reality TV reject who sued the rock matriarch for battery and negligence.

Megan Hauserman took legal action against Osbourne over claims she attacked her during a recording of TV series Rock Of Love: Charm School in December 2008.

The brawl kicked off after the contestant insulted Osbourne's husband Ozzy, calling the former Black Sabbath star a "brain-dead rocker." The 58 year old allegedly retaliated by grabbing Hauserman by the hair and scratching her.

Attorneys for Osbourne and Hauserman confirmed on Monday they had settled the case - a day before it was due to go to trial.

The terms of the deal have been kept confidential.