A lot can change in four years. It was not too long ago that Justin Bieber came tearing into the music scene with his perfectly sideswept hair and smooth moves. After everything that's happened to Justin Bieber  recently, this video is that much more poignant. Let's go back to a simpler time, a time before the Great Wall of China incident, before he had a pet monkey, and before he made candid comments about Anne Frank. Let's take it back four years to where it all started: the music video for "Baby."