Psy Rallies Army of ‘Gangnam Style’ Fans for Korean Concert

Here's something you don't see every day -- 82,000 fans all singing along to a song in unison. Something makes us think it could be bad to mess with Psy. It would be like angering Justin Bieber fans, only these guys have glow sticks. They are also clearly capable of aerobic exercise -- look at them dance. Fortunately we love the song, and Psy, so we should be fine.