Walk Hard
(2007)

Dewey Cox (John C. Reilly) finally realizes how destructive his lifestyle has become, and gives up music to spend his later years bonding with his very numerous children.

Twenty years later, he learns that a new generation has been introduced to his songs thanks to footage from his performances being edited into a popular rap video. This gets him a Lifetime Achievement Award, and at the ceremony he performs the first song he has written since the '70s as a reflection of his life. Three minutes later, he dies of a heart attack onstage.

Thanks Ryan!