Well, Koreans take tunes from us and it seems we do the same. Now, while the "han" is indeed a good solid link between us, this song doesn't exactly have it. It seems as if our tastes in pop match too though. So, this "artist", Kristian Mexis apparently thought he could use the song without anyone noticing.
The funny thing is, the guy didn't even go through the trouble of remixing it somehow or redoing it. He even uses parts of it as is and just changed the way they sound a bit. Now, this song annoys me in the original version, but the Greek one is even worse. It's unbearable.
I am not sure who this guy is, if he is professional or if he's just some guy on youtube, but I'll check it out and update with more info. I don't even know if he's making money out of this. He may just be a fan who's playing with the tune, so let's not hang the man yet. Until I know more, here is the song. Although I have a feeling they might take it down soon.
Be back with more news on this soon.
Edit: The video was indeed made private. If I find it in the future, I'll re-post.