You may find yourself bummed when you get Ke$ha’s “Tik Tok” stuck in your head. It happens. But here’s something worse, perhaps. Say you’ve actually chosen to listen to “Tik Tok.” (It happens.) And now, what gets stuck in your head isn’t the song itself, but rather some stupid video you saw of World of Warcraft things dancing along to “Tik Tok.” While it may be annoying to get a crappy pop song stuck in your head, I assure you it’s much worse to have some weird Shrek-like automatons dancing around in your head while you’re listening to “Tik Tok.”