PSY's global hit, "Gangnam Style" is currently the most viewed YouTube video of all time, surpassing more than 1 billion views. No small feat at all. The bigger feat now is following it up with another big single. As "Harlem Shake" may end up being this year's "Gangnam Style," we have a feeling "Gangnam Style" may simply be remembered as being this generation's "Macarena." Now, for you younger folk: do you remember what the Macarena was? Didn't think so.