Michael Bolton was diagnosed with glioblastoma in December 2023. His daughter shared symptoms that were “super weird” signals of his condition.

Michael Bolton is sharing new details about a somber health diagnosis he’s been navigating over the last year and a half.In a new interview with People, the singer revealed that he has glioblastoma, a form of brain cancer that the Cleveland Clinic defines as the “most common type of malignant (cancerous) brain tumor in adults.