circa 1966: Headshot of American actor and singer Nancy Sinatra, daughter of the American actor and singer Frank Sinatra, smiling over her shoulder and looking to the side. (Photo by Max B. Miller/Fotos International/Getty Images)
Singer and songwriter Glen Campbell in a recording studio at Capitol Records on December 15, 1966 in Los Angeles, California. (Photo by Jasper Dailey/Michael Ochs Archives/Getty Images)
American singer and musician Buck Owens (1929 – 2006) on the set of 'The Jimmy Dean Show', USA, 13th November 1964. (Photo by Don Paulsen/Michael Ochs Archives/Getty Images)
CIRCA 1967: Members of the rock band "Youngbloods" pose for a circa 1967 portrait. Original members include Jesse Colin Young, Lowell "Banana" Levinger, Jerry Corbitt and Joe Bauer. (Photo by Michael Ochs Archives/Getty Images)
UNITED STATES – APRIL 30: JOHNNY CASH – "The Johnny Cash Show" – 4/30/69, Johnny Cash, (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)
