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Russia's Red Army Choir have released a cover of Pharrell Williams' 'Happy' - which was the most popular single of 2014.
As The Independent reports, the choir, who perform in their full decorated uniforms, were established in Stalinist Russia in 1939.
They're a little late to the party with their choice of song - after it became the biggest selling single of 2014 in the UK, most people are more than 'happy' to have a year off from it. The choir give it their all though.
Watch Russia's Red Army Choir perform 'Happy' below
The Red Army Choir opened the 2014 Winter Olympics in Sochi, and have performed covers of 'Get Lucky' and 'Skyfall' among many others.
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