The Janoskians

The Janoskians (Just Another Name Of Silly Kids In Another Nation) are a YouTube comedy group, pranksters, singers, entertainers, and stunt performers, based in Melbourne, Australia. The group of home-grown Melbourne stuntmen began posting comedy videos on YouTube in September 2011. While describing themselves as “just a group of hopeless kids with no future taking on the streets of Melbourne”, the boys have already caught attention from Justin Bieber, One Direction’s Liam Payne, and Ellen DeGeneres.

Source: Wikipedia