Reports claim that Lisa Robin Kelly, who played the slutty sister on THAT 70’s SHOW has died of a cardiac arrest while in a rehab facility. The troubled actress had a long history of issues since the show was cancelled by FOX a few years ago. And while some stars from the show went on to bigger and better projects and movies. Lisa Robin Kelly instead slipped into some alcohol and legal issues. It was a sad end to a life a beautiful actress who had a lot of comic appeal and could have had a great career after the show ended if she could had only contained her personal demons.