LOS ANGELES, CALIFORNIA – American country singer Merle Haggard (1937 – 2016) performs at the Hollywood Bowl in Los Angeles, California, 3rd August 1973. (Photo by Michael Ochs Archives/Getty Images)
CIRCA 1975: (L-R) John McVie, Christine McVie, Stevie Nicks, Mick Fleetwood, and Lindsey Buckingham of the rock group "Fleetwood Mac" pose for a portrait in circa 1975. (Photo by Michael Ochs Archives/Getty Images)
LONDON, UNITED KINGDOM – MARCH 4: Dolly Parton performs on stage at The Dominion Theatre on March 29th, 1983 in London, United Kingdom. (Photo by Pete Still/Redferns)
American singer-songwriter Harry Chapin (1942 – 1981) plays the guitar and sings on stage during a performance, 1970s. (Photo by Hulton Archive/Getty Images)
THE JOHNNY CASH SHOW – "History of Country Music" – Airdate: January 21, 1971. (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images) MERLE HAGGARD
ATLANTA – MARCH 8: Country singer and wife of Waylon Jennings, Jessi Colter leaves her footprints at an in-store appearance at Peaches Records on March 8, 1976 in Atlanta, Georgia. (Photo by Tom Hill/WireImage)
