If you'd forgotten about him then you might be on your own.

It's been nearly two years since the release of "Gangnam Style" - the infectious K-Pop hit that smashed records all over the world.

But that hasn't stopped the song's video on Youtube rocketing past the 2 billion mark - cementing its status as the most watched video on the site.

To put that into context, that's the equivalent of the populations of China, Indonesia and the United States - combined.

After its release in July 2012 it was also the first video to get one billion views.

That's as well as spawning a horse-riding dance craze around the world.