A complete LIST OF THE SONGS by year is available in this link. You can also see some analysis and conclusions drawn there: https://misguidedrant.blogspot.se/2010/10/evolution-of-popular-music-by-year-in.html This video is intended to give a very light overview of the popular music hits, by year, in the USA, as recorded throughout history. All the pictures are intended to represent at least one of the original authors of the song WHEN it became a hit Not always will the recording used match the described year (for obvious technological and quality reasons) Why the U.S.A. alone? Information about its pop history is more easily available and dates further back, as well as the availability of some of the original songs' files. Accuracy? I cann't guarantee 100% authenticity from the period between 1890 to 1949, but I can guarantee the authencity from that period onwards. My main source was the website musicoutfitters. http://www.musicoutfitters.com/ I hope you enjoy the video! "Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use."