Charlie Christian was a forerunner in establishing the musical language of bebop. Greg Murray hide caption

itoggle caption Greg Murray

Lester Young gave Billie Holiday her nickname: "Lady Day." William P. Gottlieb/Library of Congress via flickr.com hide caption

itoggle caption William P. Gottlieb/Library of Congress via flickr.com

American jazz clarinettist and band leader Benny Goodman. Erich Auerbach/Getty Images hide caption

itoggle caption Erich Auerbach/Getty Images