The 38-year-old catwalk queen said the late world-renowned artist did the inking of two birds on her lower back and considers it worth a fortune, reported Showbiz spy.
"He told me about when he was in the navy, when he was 19 or something, and he used to do all of the tattoos for the sailors. And I said, 'Oh my God, that's amazing.' And he went, 'I can do you one. What would you like? Would you like creatures of the animal kingdom?'
"I said I liked birds and he replied, 'I've done birds. I've got it in my book. And he pointed down at a painting of a chicken upside down in a bucket. And I said, 'No, I'm not having that.' And then he said, 'Maybe I should just do you.' And I thought, I'm not going to have a girl on my back. So we decided to do a flock of birds," she said.
The model became close to the acclaimed artist when he painted her in the nude while she was pregnant with her daughter Lila Grace in 2002.
The painting was sold to an anonymous bidder at auction in 2005 for 3.9 million pounds.
