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.

The former talent manager died on August 7 at 11:13 a.m. while at his home in Butte, Montana, according to the certificate obtained by People and certified by the Butte-Silver Bow County Clerk and Recorder’s office on Thursday. 3

Blackstock’s cause of death was listed as malignant melanoma, with the matter of his passing being determined as natural causes.

It also noted his yearslong cancer battle and listed seizures as one of the “significant conditions contributing to death but not resulting in the underlyin

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