What is lego Harlem Shake?

I would wonder if any of the other fans right now are kind of in a loop about this.

I have been following the blog The Brothers Brick a lot and recently there have been a lot of postings concerning something called Harlem Shake. How many people know what this is?

Anyway, I was just going to share a link with you all to this youtube page
where the Brotherhood Workshop post their videos and then I found a video of their new Harlem Shake Goblin Style! How odd...