After some good feedback from my historical look at dances, I decided to turn my attention to popular music. It turns out there are a generous amount of websites which have recorded, or uploaded recorded data, on the most popular music, during a given year. The main websites I used for sources were "Musicoutfitters" and "Popularsong.org". This link will explain how Musicoutfitters compiled all the information regarding their pop charts.
However, Musicoutfitters only got me so far. For older data, which I should stress out, was very difficult to compile, besides that I cannot guarantee with 100% certainty that it was THE most popular song, only that it was one of THE most popular songs, I had to resort to several other websites and more google searches than I had wish for in order to make sense of it all.
Below then follows the finished youtube video, reaching an incredibly 15 minute size, to which I thank YouTube's new size limit policies.