First he dominated the world with this song.
Millions and millions of people liked it, loved it, responded to it, downloaded it, played it on repeat, and some even recreated it in their own way. So many people have remade Gotye's song, some have parodied it, many more have remixed it. Essentially: it's permeated the music world and people's brains. We just can't get it out of our heads.
As if that wasn't enough, now Gotye has officially "one upped the entire internet" (JRamundi, youtube commenter). Turn up your speakers & enjoy.