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.

I want to keep going. I feel there’s still a lot to do on the fight side,” he said. “I got a title for a song: ‘Ain’t Going Down Without a Fight.’”