Elton John is going to sing at his friends funeral

London, Dec 29 : Legendary singer Elton John might sing at friend and late star George Michael s funeral -- and it s likely to be one like his famous tribute to Princess Diana, say sources.The singer could pay tribute to Michael by performing a version of their 1991 hit "Don t let the sun go down on me". According to sources, the performance will be similar to the one at Princess Diana s funeral, reports mirror.co.uk.The star moved many to tears in 1997 when he sang a special version of "Candle in the wind" at Westminster Abbey.An insider said: "There will be so many mourners and friends. It will be the biggest funeral since George s mate Di s. Elton will sing as he did for Diana s funeral as a final farewell."Michael passed away on Christmas Day at the age of 53.