Brandon Blackstock suffered from seizures as he bravely battled cancer. Kelly Clarkson’s ex-husband passed away last week at age 48 after a private three-year fight with melanoma, a serious skin cancer, but his death certificate reveals even more about his health issues.

Kelly Clarkson's ex-husband Brandon Blackstock's death certificate says seizures were a significant contributing factor in his Aug. 7 death.

Kelly Clarkson has cancelled a performance at the Band Together Texas benefit concert in the wake of her ex-husband Brandon Blackstock's death.