The 2000s were an interesting time for music videos. MTV slowly lost its firm grip on its position of power with the advent of YouTube in 2005, signaling the new era of streaming and a new way for artists to attract and retain audiences. Fans welcomed music from the likes of Lady Gaga and Katy Perry with open arms on YouTube, but alongside the latest and greatest, some old favorites given a new life on the platform. With billions of views to go around, here are the 20 most popular music videos from the start of the YouTube dynasty.
