Kjellberg is the last name of famous Swedish YouTuber PewDiePie, who has over 25 million subscribers! His real, full name is Felix Arvid Ulf Kjellberg.
'You should check out Felix Kjellberg, he's funny!'

'Have you ever heard of PewDiePie, his real name is Felix Kjellberg!'
by horanyX March 17, 2014

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