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YouTube may just be a little more than a decade old (the video streaming site was founded in 2005), but it's had enough time to create a whole new breed of celebrity. These stars have quickly made an impressive name for themselves by sharing original visuals focused on music, video games, comedy, makeup, and any number of other topics.

Thanks to the ubiquity of YouTube, these viral sensations are some of the most recognizable faces in the world for a whole generation. How well do you really know these famous YouTubers? In honor of EW's Fanuary celebration, take our quiz below to test your mastery of the most popular streaming stars. <iframe height="531" width="100%" scrolling="no" frameborder="0" src="//" class="" allowfullscreen="" resize="0" replace_attributes="1" name=""></iframe>