Eleanora Fagan (April 7, 1915 – July 17, 1959), professionally known as Billie Holiday, was an American jazz musician and singer-songwriter with a career spanning nearly thirty years. Nicknamed "Lady Day" by her friend and music partner Lester Young, Holiday had a seminal influence on jazz music and pop singing. Her vocal style, strongly inspired by jazz instrumentalists, pioneered a new way of manipulating phrasing and tempo. Holiday was known for her vocal delivery and improvisation skills, which made up for her limited range and lack of formal music education. While there were other jazz singers with equal talent, Billie Holiday had a voice that captured the attention of her audience.