Billie Holiday ( April 7, 1915 – July 17, 1959) was an American jazz singer and songwriter. Holiday had 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. Critic John Bush wrote that Holiday "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", "Don't Explain", "Fine and Mellow".