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 It's Christmas?" for famine relief in Ethiopia. This single became the UK Christmas number one in December 1984, holding Michael's own song, "Last Christmas" by Wham!, at No. 2; Michael also donated the royalties for "Last Christmas" to Ethiopia. "Do They Know It's 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 John's "Candle in the Wind 1997", released in tribute to Princess Diana following her death (Michael attended Diana's funeral with Elton John). Michael donated the royalties from "Last Christmas" to Band Aid and subsequently sang with Elton John at Live Aid (the Band Aid charity concert) in 1985.