Kensington Palace blocked the release of a picture of Princess Diana with David Bowie because she went to his concert with James Hewitt during their affair, Denis O'Regan claims.

Princess Diana and David Bowie at Wembley Arena in London for the Concert of Hope on World AIDS Day on Dec. 2, 1993. Can't get enough of PEOPLE's Royals coverage?

A long-lost photo of Princess Diana and David Bowie, taken backstage at a 1987 Wembley concert, has finally been unearthed. However, the reason it stayed hidden for decades is even more ...

Music photographer Denis O'Regan has claimed that Kensington Palace held back his picture of Princess Diana with David Bowie after a 1987 London concert because she went to the show with James ...

Music photographer Denis O'Regan has claimed that Kensington Palace held back his picture of Princess Diana with David Bowie after a 1987 London concert because she went to the show with James Hewitt ...

It was really [that] they didn't want to fuel the fire." Princess Diana and David Bowie at the Concert of Hope benefit for World AIDS Day at Wembley Arena in London on December 2, 1993.

Nearly 40 years later, unseen photos of Princess Diana with music icon David Bowie have come to light. The pictures remained hidden for decades to allegedly avoid stirring controversy back then.

Buckingham Palace tried to stop the publication of an image of the Princess of Wales with singer David Bowie, whom she went to see perform at his Wembley Stadium concert in June 1987. The princess ...