In 2007, Yoko's chauffeur was arrested for allegedly trying to blackmail and kill her. It's claimed he told Yoko that he would release photos and audio tapes of her unless she paid him $2.5 million. He denied the charges.
After her husband, John Lennon, was fatally shot, Yoko took a photograph of his bloodstained eyeglasses laying on the pavement. In 2002, this photo sold for thousands of dollars.
The term "Yoko factor", referring to the influence of wives or girlfriends on a band's business, comes from Yoko's constant presence at The Beatles recording sessions - John broke the longstanding no-wives-or-girlfriends rule The Beatles had in the studio, to bring her there.
Yoko owns the copyrights and masters to her Apple Records releases, including Two Virgins and Life With The Lions, recorded with John Lennon.
Yoko returned to music in 1995 with her son Sean Lennon and his band 'Ima Rising'.
As a child, Yoko attended the Jiyu-gakuen Music School in Japan, the training school for many Japanese composers. She was taught piano and composition, as well as voice training in both opera and German Lied singing.
In 2003, at the age of 70, Yoko topped the US dance music charts with a reworking of Every Man Has A Woman Who Loves Him, a song she co-wrote with John Lennon, to support gay marriage: She also recorded a lesbian version of the song.
Yoko played her first public concert at the age of four, and her first composition, Secret Piece, was in 1955.
In 1963, Yoko gave birth to Kyoko Chan Cox, and in 1975, gave birth to Sean Taro Ono Lennon.
Yoko attended Sarah Lawrence College.
Yoko: When I met John I was at the point of disappearance, in the eyes of other people and myself. Where could I go after I'd done the silent music and they still didn't catch up on it? You see, the things that I did then I feel were in a field that no one has really touched on yet. I think I had something to offer but people did all sorts of things to misunderstand me and I was very lonely. I just can't stand that loneliness and always being at the point of disappearing. So I'm quite happy screaming and all that, making my presence clear, and it's a healthier thing to do.
Yoko: (on John Lennon) He was very astute about his work. If he didn't like it he'd immediately throw it in the trash can because he was fully aware that he was famous and it might get out there someday.
Yoko: So many people have approached me and said, 'Can I do a musical of John,' ... It's a very simple idea, you know - wow, a musical of John! But I've said no. This time, I said yes, because I liked the idea of having these different actors playing John. Because in the years after John's passing, John has transformed into something else. People in Asia think of him as their hero. People in Africa think of him as their hero. He was a hero for the whole world, and not just a white hero. So it's great to have a black performer singing as John. For me, this play is a revolution, a quiet revolution.
Yoko: All my concerts had no sounds in them; they were completely silent. People had to make up their own music in their minds!
Yoko: Cosmetics is a boon to every woman, but a girl's best beauty aid is still a near-sighted man.
Yoko: I wonder why men get serious at all. They have this delicate, long thing hanging outside their bodies which goes up and down by its own will. If I were a man I would always be laughing at myself.
Yoko: Everybody's an artist. Everybody's God. It's just that they're inhibited.
Yoko: Spring passes and one remembers one's innocence. Summer passes and one remembers one's exuberance. Autumn passes and one remembers one's reverence. Winter passes and one remembers one's perseverance.
Yoko: (on Heather Mills after she split from Paul McCartney) I feel very bad for her. I know better than anyone what it's like being a Beatle wife. Nobody gives you an easy time. Whatever happened in their marriage i don't know. But it must be very hard for her as well as Paul.