Renowned opera singer knighted by Queen Elizabeth II for her services to music.
Famous for singing roles origionally done by Castrati. Castrati were male singers who were castrated before puberty so that their voices wouldn't change. The Castrati sound combined the purity of a boy's voice, with the lung power and control of a full-grown male voice. Because this practice has been outlawed, today only women can sing in the range of a castrato role. Baker specialized in this type of role and became very famous for it.
info taken from http://www.imdb.com