The alleged New Zealand mosque gunman told people to 'subscribe to PewDiePie.' Here's the story behind the notorious YouTube star.

YouTube Felix Kjellberg — who, under the name PewDiePie, is the most popular YouTuber in the world — was entangled in controversy when the New Zealand mosque shooter told people watching his livestream to subscribe to his channel. Kjellberg said he was "absolutely sickened" by the shooting. The YouTube star has been caught in controversy before for anti-Semitic, racist, and sexist pranks and comments. Though he's issued apologies, he remains notorious on the platform. YouTube's biggest star ...