Yoko Ono is a japanese artist, singer and songwriter. Her work also encompasses performance art. She is also known for had been married with singer-songwriter John Lennon (The Beatles) from 1969 until his death in 1980. About her voice, Ono has an wide vocal range over five octaves. Her vocals can be sweet, clear and "childish", but she can sing agressive and powerful vocals too. Yoko Ono is one of the greatest names of experimental music and many people don't understand her singing style, but that's the way she does her artwork.