That Hollywood talent agent accused of socking it to Sharon Osbourne at a posh Los Angeles eatery last week is fighting back. Osbourne, who went on TV this week to show off her black-and-blue chin, claimed Renee Tab "viciously attacked" her. Well, in a statement issued Wednesday, Tab insists it was Sharon who "viciously, verbally and physically attacked and spat" on her. Can we all just agree that both these ladies are extremely overpaid and end it there?