It's been at the top of the Official UK Singles Chart all year so far and has notched up No 1s in more than 10 countries around the world.

And while Mark Ronson's Uptown Funk owes much of its success to Bruno Mars' superb vocal performance, the US star has just been replaced by an even-more-famous collaborator in a new viral video.

That's right, it's now Uptown Funk (ft. Barack Obama), thanks to the video editing skills of one very patient fan.

The US President's "cover version" of the catchy retro-funk workout was released on the popular Barackdubs channel on YouTube this week - and has already collected more than 800,000 views.

And if you think that sounds like it's going to be awkward and a bit rubbish, just check it out - it's actually very amazing.

And if you liked that then put a date in your diary for 9 February - when the channel promises to bring us Obama singing Taylor Swift's Shake It Off!