Randy Meisner, Bernie Leadon, Glenn Frey and Don Henley of The Eagles pose for a group portrait in London in 1973. (Photo by Gijsbert Hanekroot/Redferns)
Singer-songwriter Joni Mitchell provides backing vocals during the recording of Carole King's album 'Tapestry' at A&M Records Recording Studio in January 1971 in Los Angeles, California, United States. (Photo by Jim McCrary/Redferns)
CHICAGO – MARCH 1973: (L-R) American singer, songwriter, guitarist and pianist Gram Parsons (1946-1973) performing with American singer, songwriter, and musician Emmylou Harris during Parson’s “Fallen Angel’s Tour" at The Quiet Knight in Chicago, IL on March 3, 1973. (Photo by Icon and Image/Getty Images)
1972: Singer and songwriter and founding member of the band 'The Byrds' poses for an A&M publicity shot in 1972. (Photo by Michael Ochs Archives/Getty Images)