Yoko Ono, artist and widow of John Lennon, has returned to London with an exhibition at the Serpentine Gallery.
Speaking to the BBC's arts editor Will Gompertz, she said she never chose to be an artist but art "was like a survival message" for her.
On her marriage with John Lennon, she said they had a "certain arrogance" and thought the public would accept them. "It was a surprise that people didn't like us," she admits.
"I was always a rebel, knocking down the door," she says about her image and reputation, "and now I'm not".
"Now the door is suddenly open I don't know what to do with it," she says.
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