Borussia Dortmund fans have become famous around Europe in recent seasons for creating a brilliant atmosphere at the 80,000-capacity Westfalenstadion.
The stadium, which features the biggest terrace in Europe at 25,000, and atmosphere have become a big part in Dortmund's rise to prominence at home and abroad after years in financial crisis.
As well as the gigantic murals they create, they are also inventive singers.
At the weekend, Dortmund played in their final home game before the Bundesliga goes on their month-long winter break.
Following the 4-1 win over Eintracht Frankfurt, Thomas Tuchel and his players went for the familiar walk around the pitch (taken up by Jurgen Klopp at Liverpool after the draw with West Brom).
After saluting the players, the fans then broke into a spontaneous rendition of Jingle Bells.
Watch the video here:
Dortmund don't play at home again until 30 January.
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