Well before her famous partnership with John Lennon, Yoko Ono was the "High Priestess of the Happening" and a pioneer in performance art. Drawing from an array of sources from Zen Buddhism to Dada, her pieces were some of the movement's earliest and most daring.
https://en.wikipedia.org/wiki/Yoko_Ono
Yoko Ono born 18th February 1933 Tokyo Japan aged 83. Ono grew up in Tokyo, and studied at Gakushuin. She withdrew from her course after two years and rejoined her family in New York in 1953. She spent some time at Sarah Lawrence College, and then became involved in New York City's downtown artists scene, including the Fluxes group. She first met Lennon in 1966 at her own art exhibition in London, and they became a couple in 1968. 

Cut Piece (1964)

A landmark work, and one of the artist's best-known, Cut Piece was presented at the Sogetsu Art Center, the same Tokyo venue that had hosted her Bag Piece. Ono wore one of her best suits and knelt on the stage holding a pair of scissors. She invited audience members to cut pieces of her clothing off using the scissors. The artist remained still and silent until she was down to only her underwear. The process of witnessing clothes cut from the body elicited a range of responses from the audience. Themes of materialism, gender, class, and cultural identity were central to the work.

According to Ono, her original intention was to harness the Buddhist mentality (Buddha, born a wealthy prince, achieved enlightenment by giving up everything and sitting under a tree for seven years), with a feminist subtext: women too often need to give up everything. This performance was a demonstration of that reality. Ono's Cut Piece was the first performance piece to address the potential for sexual violence in public spectacle. It is also among the first examples of Performance Art.

Body, Clothes, and Scissors (Performance piece)

http://www.theartstory.org/artist-ono-yoko.htm