Prior to the formation of the
British Phonographic Industry in 1973, the only way to know if a record had sold a million copies in the United Kingdom was if the record company alerted the press. In addition, in many cases the record company would present the artist or group with Gold Records to commemorate the million sales. However, there was some controversy over whether certain singles had actually reached sales of one million copies in the United Kingdom. In April 1973, the
British Phonographic Industry (BPI) began classifying singles and albums by the number of units sold to dealers. The highest threshold is "
Platinum record" and was then awarded to singles that sold more than 1 million units. In February 1987, the BPI introduced multi-Platinum awards so that if a single sold 1,200,000 units it was classified as double Platinum, 1,800,000 units as triple Platinum, etc. the first single to achieve a million digital sales was "
I Gotta Feeling" by
the Black Eyed Peas. Additionally,
audio streaming has been included in the official chart and BPI awards since 30 June 2014, at a rate of 100 streams representing one unit sale; This record was broken in 1977 when
Paul McCartney's subsequent band
Wings surpassed it with "
Mull of Kintyre", which also became the first song to sell 2 million copies in the UK. In 1984,
Band Aid released the charity-record "
Do They Know It's Christmas?" in response to the
famine in Ethiopia; it sold 1 million copies in the first week and soon became the best-selling single. This record was broken in 1997, following the
death of Diana, Princess of Wales, when
Elton John released "
Candle in the Wind 1997", a re-write of the
Marilyn Monroe tribute released in 1973. Selling more than 650,000 copies on its first day on sale and more than 1.5 million in its first week, it quickly became the UK's best-selling single. It was classified by the BPI as 9× Platinum (5.4 million) in October 1997, but more recent reports by the OCC put its total sales at 4.93 million. ==Million-selling singles (paid-for sales)==