Yoko Ono is an experimental artist and musician born in Tokyo in 1933. Her early career involved avant-garde performance art pieces in the 1960s that often demanded participation from audiences, such as her famous 1964 work "Cut Piece" where audience members cut away her clothing. She met her second husband John Lennon in 1966 and they collaborated creatively until his death in 1980. Ono's conceptual art focuses on audience interaction and challenging expectations through provocative ideas and acts.