Princess Diana was always close to her children, sometimes even a little too close... According to the Closer website, she had a rather embarrassing surprise in store for her son Prince William in the ‘90s.An intimidating surpriseLady Di had apparently invited four top models from the '90s to Kensington Palace for his 13th or 14th birthday; Cindy Crawford, Claudia Schiffer, Christy Turlington, and Naomi Campbell.Supermodel Cindy Crawford opened up about this story on Instagram:Princess Diana had somehow got the number to my office and called herself to ask for me. My assistant was in shock!Before adding:We finally connected and she asked if the next time I was in London I would come by for tea — I think Prince William was just starting to notice models and she thought it would be a cute surprise for him and Prince Harry. I was nervous and didn't know what to wear, but remember as soon as she came into the room and we started talking, it was like talking to a girlfriend.Naomi Campbell also opened up about the experience, as reported by Closer:I went with Claudia and Christy. And he [William] was coming home from school and we had gotten there before he had gotten home from school and Princess Diana was like, “Okay.” So we were just like, “What do we do?” I mean, it was so sweet.In any case, Lady Diana must have thought that Prince William would be delighted to meet these incredible models in person, however it must have been a surprise that was quite intimidating for the young man!