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.

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