The Star Wars Kid, Numa Numa Guy and Dramatic Gopher are all "stars" that had millions of views on their -- sometimes unintentional -- videos.
South Park, in its usual fashion, features some of them when the kids try to collect what they think is owed to them at the Department of Internet Money. Hmmm ... think I know that place! [insert knowing winking smiley icon here, I refuse to.]
Meet The Internet Stars