Seasonal favourite Fairytale Of New York has been named the UK's most downloaded Christmas song.
The Official Charts Company has calculated that 15.4 million festive tracks have been bought digitally in the decade since legitimate downloading began, with The Pogues and Kirsty MacColl's track heading the big sellers.
Despite both being released 40 years ago, seasonal hits by Slade and Wizzard still continue to shift huge numbers and both make the top five of the biggest sellers of the past 10 years.
Although Slade's Merry Xmas Everybody was victor in the 1973 chart race between the two songs, it only makes number five in the download list behind Wizzard's I Wish It Could Be Christmas Everyday at four.
The Official Charts Company's c hief executive Martin Talbot said: "We've always known that British music fans love their Christmas tunes, but this new analysis shows just how much.
"Every year, these classics are selling well over 500,000 copies between them, year after year - with some of the biggest titles selling over 100,000 copies a year.
"We certainly are a nation of festive classic fanatics."
Gennaro Castaldo of music industry trade body the BPI said: "Along with CD compilations, downloads and now streaming have helped to give our classic Christmas songs a new lease of life and make them a permanent part of our festive celebrations each year."
Second in the list was Mariah Carey's All I Want For Christmas Is You, which has just broken through the million sales barrier (including physical versions).
:: UK biggest selling Christmas downloads
1. Fairytale Of New York - The Pogues with Kirsty MacColl
2. All I Want For Christmas Is You - Mariah Carey
3. Last Christmas/Everything She Wants - Wham!
4. I Wish It Could Be Christmas Everyday - Wizzard
5. Merry Xmas Everybody - Slade
6. Do They Know It's Christmas - Band Aid
7. Merry Christmas Everyone - Shakin' Stevens
8. Driving Home For Christmas - Chris Rea
9. Stay Another Day - East 17
10. Rockin' Around The Christmas Tree - Brenda Lee