Ylvis

Ylvis is a comedy duo from Bergen, Norway consisting of brothers Vegard and Bård Ylvisåker. They debuted as professional variety artists in 2000 and have since had a string of highly successful variety shows, comedy concerts, television shows, radio shows and music videos. They are currently the hosts of popular Norwegian talk show, I kveld med Ylvis (Tonight with Ylvis). Written and filmed for the talk show, their song and music video "The Fox (What Does the Fox Say?)" went viral on YouTube in September 2013 with over 347 million views to date, bringing the brothers to international attention.

source: Wikipedia