LOS ANGELES – CIRCA 1976: Singer/songwriter Dan Fogelberg performs onstage with an acoustic guitar in circa 1976 in Los Angeles, California. (Photo by Michael Ochs Archives/Getty Images)
NASHVILLE, TN – JUNE 7: Bob Dylan and Johnny Cash perform together with acoustic guitars on 'The Johnny Cash Show' on June 7, 1969 in Nashville, Tennessee. (Photo by Michael Ochs Archives/Getty Images)
LONDON, ENGLAND – OCTOBER 08: Vashti Bunyan performs on stage at St Pancras Old Church on October 8, 2014 in London, United Kingdom. (Photo by Rob Ball/Redferns via Getty Images)
