American country singer and songwriter Johnny Cash (1932 – 2003) plays acoustic guitar in a still from his television variety series, 'The Johnny Cash Show,' circa 1968. (Photo by Hulton Archive/Getty Images)
(left to right) June Carter Cash and Johnny Cash, country music singers. Minneapolis STAR photo Sept 1, 1970, by Charles Bjorgen. (Photo by CHARLES BJORGEN/Star Tribune via Getty Images)
Country singer songwriter June Carter Cash sits backstage at the Grand Ole Opry circa 1951 in Nashville, Tennessee. (Photo by Bob Grannis/Getty Images)
Musicians June Carter Cash and Johnny Cash perform in concert on December 4, 1970 at Madison Square Garden in New York City. (Photo by Ron Galella/Getty Images)
AUSTIN, TX – APRIL 20: Musician Ronnie Dunn performs during the "We Walk The Line: A Celebration Of The Music Of Johnny Cash" show at ACL Live on April 20, 2012 in Austin, Texas. (Photo by Gary Miller/FilmMagic)
