Singer Phil Everly, left, one half of the groundbreaking, smooth-sounding, record-setting duo the Everly Brothers. has died, a hospital spokeswoman said. He was 74. Hulton Archive/Getty Images
During the late 1950s and early 1960s, Phil Everly and his brother, Don, right, ranked among the elite in the music world by virtue of their pitch-perfect harmonies and emotive lyrics. Getty Images
Rolling Stone labeled the Everly Brothers "the most important vocal duo in rock," having influenced the Beatles, the Beach Boys, Simon & Garfunkel and many other acts. Here, with Phil on the left, they perform on the Johnny Cash Show in 1970. ABC Photo Archives/ABC via Getty Images
Phil Everly in London after signing a recording contract with Pye Records, having just recorded an album and a single, "Invisible Man," with his producer and close friend Terry Slater. Keystone/Getty Images
The Everly Brothers and their band performing at their reunion concert at the Royal Albert Hall, London, in September 1983. From left, Mark Griffiths, Graham Jarvis, Phil Everly, Albert Lee, Don Everly and Martin Jenner.
The Everly Brothers, Phil, left, and Don, support Simon and Garfunkel during a concert in Hyde Park, London. Jo Hale/Getty Images