Brandon Blackstock, the former husband of Kelly Clarkson, medically suffered from malignant melanoma, an aggressive and serious form of skin cancer. He battled this melanoma privately for over three years before passing away at age 48 on August 7, 2025, at his home in Butte, Montana under hospice care surrounded by family. His death certificate listed malignant melanoma as the underlying cause of death. Additionally, seizures were noted as a significant contributing condition to his passing but were not the primary cause. There was no autopsy performed, and his body was cremated. Melanoma is a dangerous type of skin cancer that begins in melanocytes, the cells responsible for skin pigment. It often results from overexposure to ultraviolet (UV) rays and is considered one of the deadliest skin cancers because it can spread quickly to other parts of the body. In summary, Brandon Blackstock was medically affected by malignant melanoma and seizures related to his cancer condition, which ultimately contributed to his death.