On Friday, a cover of the song "Somebody That I Used to Know" performed by Walk Off the Earth began to draw attention for its use of just one guitar and five performers for all the music. By Sunday, the video was averaging three million views a day, with most of the viewers coming across it as it was shared on social media sites.

The band, which has posted videos on its channel dating back to June of 2009, had drawn a significant 4.8 million views up until last Thursday. But since then, their work has been seen almost 20 million times around the world.

Today, it remains one of our most shared and most viewed clips. It's the most viewed video in Germany, Australia, Belgium, Canada, Netherlands, Poland, Spain, and Sweden.