BRITAIN: Princess Diana had a passionate one-night stand with John F Kennedy jnr, according to a new book.
The pair had a fling, which Diana described as "pure chemistry", said her friend and confidante Simone Simmons.
She rated Kennedy "10 out of 10" in bed, and said their session in a New York hotel was "pure lust", Simmons claims in Diana: the Last Word, which is serialised in the Sun newspaper.
She said the princess fantasised about becoming America's First Lady.
Diana's former butler, Paul Burrell, dismissed the claims.
"Simone has concocted a fantastical story of nonsense in much the same vein as the mystical rubbish she used to feed the princess," he told the Daily Mirror.
Simmons, an energy healer, said she had kept the secret for a decade but now wanted the world to know Diana had found happiness after Prince Charles.
Kennedy died in a plane crash two years after Diana was killed in Paris in 1997.
The pair met in 1995 when Kennedy was trying to persuade her to give him an interview for his magazine, George.
She turned down the request, but agreed to meet him at a plush hotel on Manhattan's upper East Side, overlooking Central Park, Simmons recalls.
When Kennedy arrived, Diana was said to have been "bowled over" by his charm. She told Simmons: "We started talking, one thing led to another - and we ended up in bed together. It was pure chemistry." Diana had Kennedy's astrological chart drawn up and concluded they were compatible in a number of ways but not enough to sustain a relationship, Simmons writes.
They stayed in touch for a short while but Diana eventually accepted it was not meant to be, and the following year Kennedy married Carolyn Bessette.
Simmons's first book on the princess, Diana: The Secret Years, was published in 1999. - (PA)