Yes. He, in fact, sang two versions of this song, one recorded in 1973 and the second recorded in 1997.
your song
Bennie
Yes, Elton John sang the Drover's song in the film Australia
No.
Yes
No
He sang a re-written version of his song 'Candle In The Wind'. The song was originally written as an elegy to Marilyn Monroe, but he altered the lyrics so that they were about Diana's life and early death.
No Boz Scaggs does
He should sing a song about Lucille Ball.
It was written for Marilyn Monroe A.K.A Norma Jean as an ode and dedication to her life after she died in 1962. He was very good friends with Monroe so it meant a lot to him to be able to write a song about her life
Mona Lisa and Mad Hatters Hercules Honky Cat Susie
because lots of people were her hero.