Brandon Blackstock's death certificate has been issued after he died on Aug. 7 at his home in Butte, Montana The document verified that the talent manager and former husband of Kelly Clarkson, died of melanoma,

Blackstock died at his home in Butte, Montana, on Aug. 7. He was 48. The death certificate said that his cause of death was malignant melanoma, or a type of skin cancer, with his manner of death listed as natural causes, People magazine reported.