Billie Holiday (born Elinore Harris; April 7, 1915 - July 17, 1959) was an American jazz singer and songwriter. Nicknamed Lady Day by her friend and musical partner Lester Young, Holiday was a seminal influence on jazz and pop singing. Her vocal style, strongly inspired by jazz instrumentalists, pioneered a new way of manipulating phrasing and tempo. Above all, she was admired all over the world for her deeply personal and intimate approach to singing.

Critic John Bush wrote that she "changed the art of American pop vocals forever." She co-wrote only a few songs, but several of them have become jazz standards, notably "God Bless the Child (God Bless the Child (Billie Holiday song))", "Dont Explain (Dont Explain (song))", "Fine and Mellow (Fine and Mellow (song))", and "Lady Sings the Blues (Lady Sings the Blues (song))". She also became famous for singing jazz standards including "Easy Living (Easy Living (song))" and "Strange Fruit".