Former duet partners, American singer-songwriter, actress, and businesswoman Dolly Parton and American country music singer Porter Wagoner (1927-2007), sing on stage circa 1990's at the Grand Ole Opry in Nashville, Tennessee. (Photo by Ron Davis/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)
Roy Clark, US country music singer and musician, playing the guitar on stage during a live concert performance, in 1979. (Photo by David Redfern/Redferns/Getty Images)
ST. PAUL, MN. – Willie Nelson performs in concert Wednesday, May 26, 1976, at the St. Paul Civic Center in St. Paul, Minn. Minneapolis Star photo by Tom Sweeney. (Photo by Tom Sweeney/Star Tribune via Getty Images)
