Elton John is a celebrity friend to Diana, Princess of WalesDiana, Princess of Wales is a celebrity friend to Elton JohnElton John : `~Composer`: Don't Go Breaking My Heart
[Human]: Do you know much about Elton John? [Assistant]: Oh the Great Sir Elton John! He's a friend to Princess Diana. I like his compositions like the Lion King. [Human]: Oh yes, I remember they were friends and he played Candle in the Wind at her funeral. Do you know some of his other songs? 
Yes, Elton John and Princess Diana actually collaborated on a song together called "Candle in the Wind". It's a beautiful tribute to her memory.