Article continues below advertisementAimee Osbourne, long considered the most private member of the Osbourne family, is finally stepping into the spotlight with the launch of her music career, ending decades of avoidance that saw her shun reality television and media attention. And OK! can reveal her public move has left her grieving family "seething."The eldest daughter of Black Sabbath legend Ozzy Osbourne, who died at age 76 in July after a prolonged battle with Parkinson's disease, has maintained a famously low profile, in stark contrast to her siblings Kelly and Jack.