BIG SUR – SEPTEMBER 15: Crosby, Stills and Nash and Young (L-R David Crosby, Graham Nash and Stephen Stills) perform onstage at the Big Sur Folk Festival held at the Esalen Institue on September, 15 1969 in Big Sur, California. (Photo by Robert Altman/Michael Ochs Archives/Getty Images)
Graham Nash (Photo by Amy Grantham/Courtesy of Sacks & Co.)
David Crosby and Graham Nash (Photo by Andre Csillag/Shutterstock)
BOSTON – AUGUST 1974: Crosby, Stills, Nash & Young perform at the Boston Garden on August 6, 1974 (Ron Pownall/Getty Images)
Crosby, Stills, Nash & Young perform at Olympia Stadium on June 12, 1970 in Detroit, Michigan. Photo by Tom Copi/Michael Ochs Archives/Getty Images)
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Philadelphia PA: Mick Jagger of The Rolling Stones performs in 1989 (Photo by MpiRock/MediaPunch via Getty Images)
1963: British pop group The Beatles, from left to right: George Harrison (1943 – 2001), Paul McCartney, John Lennon (1940 – 1980) and Ringo Starr, in Sweden. (Photo by Keystone/Getty Images)
teve Perry poses for a photo at the 1985 "Bammies", the Bay Area Music Awards, designed to recognize local performers and hosted annually since 1977 by BAM, a San Francisco music magazine. Perry won awards for Outstanding Album and Outstanding Male Vocalist. (Photo by © Roger Ressmeyer/CORBIS/VCG via Getty Images)
American singer-songwriter Tracy Chapman plays her Fender acoustic guitar at a recording studio in Los Angeles, California, circa 1988. (Photo by Lester Cohen/Getty Images)
