Yoko Ono

aiu: a yoko ono - "By the mid-1960s Yoko Ono was an established figure in the underground art scene; she had begun performing musical pieces, presented events with a loosely affiliated group of artists who worked under the name Fluxus, published a book of instructional poems entitled Grapefruit (e.g. "Hammer a nail in the center of a piece of glass. Send a fragment to an arbitrary address."), and was making films."
aiu: a yoko ono, Wikipedia, IK!, SFMOMA, MySpace, YouTube, (1), (2)