Nick Gravenites, the blues-rock singer and guitarist who co-founded The Electric Flag and wrote songs for Janis Joplin, has died at 85, his family announced.

Kristofferson died Saturday at his home in Maui, Hawaii, a representative for Kristofferson confirmed to USA TODAY. A cause of death was not given. "It is with a heavy heart that we share the news our husband/father/grandfather,

Kris Kristofferson, who became one of the most influential American singer-songwriters of his time with works such as "Me and Bobby McGee," as well as a successful actor, died Saturday at the age of 88,