YouTube superstar PewDiePie, aka Felix Kjellberg, has been meeting fans in London as he promotes his first book.
The 25-year-old from Sweden has the most subscribed channel on YouTube, with nearly 40 million subscribers, who regularly tune in for his irreverent video game commentary and vlogs on random subjects.
To date, he has amassed more than 10 billion views on his channel since its launch in 2010.
"This Book Loves You" is out later this week and is a 250-page collection of "inspirational sayings".
Speaking to ITV News, PewDiePie gave a preview of some of the type of "gems" in the book.
The Swede said got the idea for the book from fans of his channel, "I used to make jokes likes these, I think it's fun to make parody of inspirational quotes, if people like them that's fine but I kind of like poking fun at them".
His pulling power
When asked what he thought had made him so successful, PewDiePie said: "I think it you ask my fans they would say they can really connect to me in a way."
"I'm a silly, funny guy, who's fun to watch, I guess. I hope so at least", he added.
According to Forbes magazine, PewDiePie earned $12m (£7.7m) over the past year, and such is the power that advertisers are lining up to reach his "Bro Army" of fans.
Earlier this year, PewDiePie, addressed his huge earnings in a post called "Let's Talk About Money", after facing a backlash from fans.
He said: "Money is a topic I have purposely tried to avoid in the five years I've been making videos as I just feel like its not important to anyone.
"I just want to make entertaining videos. Don't get me wrong though I don't hate money", he laughed.