If you read the title, you'd know who I'm writing about.
Felix Arvid Ulf Kjellberg, also known famously as PewDiePie, is a 25 year-old Swedish video game commentator known for his videos on YouTube. PewDiePie is known for his Let's Plays on horror video games, as well as playing many other types of games, and records his reactions through audio and webcam recording. PewDiePie's fanbase is known as the "Bro Army" which includes, as of the 30th of December 2014, more than 33,200,000 subscribers on YouTube.
The name "Pewdie" was created from the pew sound of lasers and die for death. After forgetting the password to his YouTube account under the name Pewdie, he created a similarly named one by adding the word pie because he loves pie, forming "PewDiePie".
I would subscribe to PewDiePie's channel, but I'm too young. I also don't have a YouTube account, but in a few years time I'll subscribe. PewDiePie is someone who's videos must be watched, and if you haven't watched one already, watch it! See you!