Chuck Mangione, the Grammy-winning jazz bandleader and musician who scored an unlikely top-five hit in 1978 with the jazz instrumental "Feels So Good," has died at age 84, according to a note on his official website.

He was a Grammy-winning jazz legend, but a whole new generation knew him as the guy in the hat from ‘King of the Hill.’ Chuck Mangione, the musician behind ‘Feels So Good,’ has died at 84.

Chuck Mangione, the jazz flugelhorn and trumpet player whose catchy instrumental 'Feels So Good' made the pop top 10, has died at 84.