It's a song written and performed by a pair of Norwegian comedians just for shits and giggles.
What amuses me about this song is how some people seem to think they're meant to take it seriously or something when actually, it's just something some guys did for a laugh, because they could. Like, it made it pretty high on the charts and all these people are being all, yeah, well, it'll drop again soon, it's just a fad, blah blah blah, and I and everyone else I know and probably the people who made it are like, yeah, so?