You may remember Ylvis from their viral hit "What Does the Fox Say." Think of them as kind of a Norwegian version of Weird Al.

Their latest video skewers a cappella groups (specifically Pentatonix).

Ylvis is a Norwegian comedy duo consisting of brothers Vegard and Bård Ylvisåker.

They are currently the hosts of the Norwegian talk show I kveld med Ylvis (Tonight with Ylvis). Their song and music video "The Fox (What Does the Fox Say?)", went viral on YouTube in September 2013, with over 566 million views as of December 2015.

Now they're back with a weird tribute to a capella groups, as they come to the aid of a kid being bullied by his school mates.

It's weird and it's wonderful.