Michael Bolton said he "ain't going down without a fight" as he battles glioblastoma, an aggressive form of brain cancer.

The Grammy winner opens up to PEOPLE in this week's cover story about staying hopeful amid a devastating diagnosis

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.