We collectively watch more than 6 billion hours of YouTube videos every month.
That's billions of viral hits, vlogs and sketches you can pore over, one of many reasons YouTube has become such a popular enterprising tool. It's created celebrities out of everyday people, tapping into an overflowing well of creativity.
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These eight YouTubers are rising stars, capitalizing on their growing fan bases. From nutrition vloggers to sketch comedians to boisterous little kids, here are the YouTube channels you should keep an eye on in 2015.