Friday marks the tenth anniversary of the release of 'Gangnam Style'.
The song, by South Korean rapper Psy Sigh, was the first to reach 1 billion views on YouTube - it now has more than 4 billion - and was a turning point for recording artists and the way they used social media.
In fact, soon after its release, Billboard changed the way it compiles its charts, adding YouTube streams and other online platforms to the mix.
But more than that, Gangnam Style also put K-Pop, and Korean culture, on the map in a way that hadn't happened before.
Fine Koloamatangi is studying K-Pop for the PhD at the University of Auckland.
She spoke to Corin Dann.
