Diana, Princess of Wales with her sons, Prince William and P [Getty Images]

UNITED KINGDOM - OCTOBER 04: Diana, Princess of Wales with her sons, Prince William and Prince Harry, at the piano in Kensington Palace (Photo by Tim Graham Photo Library via Getty Images) — see more

UNITED KINGDOM - OCTOBER 04: Diana, Princess of Wales with her sons, Prince William and Prince Harry, at the piano in Kensington Palace (Photo by Tim Graham Photo Library via Getty Images)

Tim Graham Photo Library Tim Graham