Billie Holiday (born Eleanora Fagan 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. Billie Holiday had a difficult childhood. Much information once not considered true was confirmed in the book Billie Holiday by Stuart Nicholson in 1995.