Elle Fowler, 21, is one of the most successful YouTube gurus, with her own YouTube channel with over... 
(YouTube)
"For every hundreds of beauty products I try, I make one video for," she said. "I don't really know what the special recipe is for being popular, but with me, I kind of attract the teenager crowd, and part of it is because they can relate to me."
The business even runs in the family. Younger sister Blair, 16, also creates her own YouTube videos on makeup and the sisters promote their mother's monogrammed key chains on their separate channels. Sales have gone through the roof with the girls' big smiles and pearly whites behind the product.
Another famous YouTube sensation, Michael Buckley of "What the Buck?" said he spent 40 hours a week on YouTube before making a dime.
While calling his celebrity gossip-infused show "silly," the money has helped him pay off his credit card debt, and he finally quit his job as an assistant for a music promotion company in September 2008 after his "six figure" YouTube revenue had exceeded his day job salary.
"It's changed my life in every single way," Buckley, who lives in Connecticut with his husband and four dogs, said. "I can't even begin to talk about it. It's going very well."
Every episode of "What the Buck?" is viewed an average of 200,000 times, and some have reached up to 3 million people. The 34-year-old said that writing, hosting and producing his videos, which have mimicked everyone from Miley Cyrus to Britney Spears, is not easy.
"It's definitely me, but it's an extreme version of me," Buckley said of his hosting demeanor. "If you meet me, I'm not as hyper in person. I'm also way more opinionated."
He also said he can "never, never" see himself going back to a regular 9-to-5 job after his YouTube success.
"I'm really just focused on enjoying myself," he said. "Even if people don't like celebrity gossip, people will like the joy of my presentation."
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