In September 1966, yoko Ono, 33, performed her famous Fluxus performance art Cut Piece in London.

In the audience sat John Lennon, while Yoko Ono sat up straight on the stage and said, "Come on, cut my clothes, wherever you want;
Each person cut no larger than a postcard, and please give this fragment to anyone you love. The audience took the stage one after another, cutting Yoko's clothes in silence until she was naked. This was Lennon's first meeting yoko.
On the evening of December 8, 1980, Lennon and Yoko walked out of the studio while they were finishing guitar music for Yoko's song "Walking on Thin Ice."
Yoko and her husband discussed, "Why don't we have dinner before we go home?" Lennon replied, "No, let's go home, because I want to see Sean before I go to bed." As usual, the couple, who were returning home to see their son, walked to their own Dakota apartment building in Manhattan, while mark David Chapman's bullets were waiting for them on the other side of the street.
Death ended Yoko and Lennon's 12-year marriage, eventually making her the first widow in the music industry.
The love of John Lennon and Yoko Ono in the old photograph