MTV?s steady and somewhat sad transformation into a channel more widely know for reality TV programming than for music seemingly signaled the end of the music video era. But in February of 2005, YouTube came along and completely changed the game. Not only did YouTube?s massive popularity help bring the visual art form known as the music video back to life, the site quickly became an extremely popular destination for people to listen to music.

By 2015, YouTube had emerged as the unassuming king of music streaming, besting out industry heavyweights like Pandora and Spotify by a wide margin. In fact, during the first half of 2015, an estimated 57% of all 135.2 billion music streams were reportedly served by YouTube.All that being said, if you take a look at the top 10 most-watched YouTube videos of all-time, you probably shouldn?t be too surprised that they?re all music videos. And speaking to YouTube?s popularity and nearly global reach (it?s still blocked in China), the number of views on this top 10 list have all surpassed the 1 billion threshold. 1. Psy- ?Gangnam Style? ?  2.49 billion views
Originally released on July 15, 2002, ?Gangnam Style? quickly became a cultural and global phenomenon, anchored by an arguably catchy tune and a ridiculously bizarre, delightful, and visually engaging K-pop video. And oh yes, did we mention it came with its own dance" Thankfully, the dance has since gone the way of the dodo, but ?Gangnam Style? still holds the record for bei...