SoJO is very sad to report another celebrity passing away way before their time.  


Lisa Robin Kelly who played Topher Grace's older sister on "That '70s Show" died in her sleep Wednesday night at a rehab clinic.


She was only 43.  The cause of death was cardiac arrest.


Making things even more tragic, Lisa died in REHAB.  She'd checked herself in voluntarily on Monday to fight her addictions, and her agent says she was determined to get clean


Lisa had been arrested multiple times over the past few years, for DUI, spousal abuse and other offenses.


Regardless, I always laughed when she attempted to seduce Kelso (Ashton Kutcher)