 Complete the following phrase:  In November 1984, Michael joined other British and Irish pop stars of the era to form Band Aid, singing on the charity song Do They Know Its Christmas? for famine relief in Ethiopia. This single became the UK Christmas number one in December 1984, holding Michaels own song, Last Christmas by Wham!, at No. 2; Michael also donated the royalties for Last Christmas to Ethiopia. Do They Know Its Christmas? sold 3.75 million copies in the UK and became the biggest selling single in UK chart history, a title it held until 1997 when it was overtaken by Elton Johns Candle in the Wind 1997, released in tribute to Princess Diana following 