Reelin' In The Years with Bob Labbe - Today is Pop Chart Day: On January 4, 1936, Billboard magazine published its first music hit parade. The first Music Popularity Chart was calculated
The Billboard Book of Top 40 Hits, 9th Edition by Joel Whitburn: 9780823085545 | PenguinRandomHouse.com: Books
Billboard Top Hits 1990 by Various Artists (Compilation, Pop Rock): Reviews, Ratings, Credits, Song list - Rate Your Music
![billboard on Twitter: "The top #Hot100 songs of 2020. 💯 See the complete year-end @billboardcharts here: https://t.co/UNqmUlLePw https://t.co/NWs164WBns" / Twitter billboard on Twitter: "The top #Hot100 songs of 2020. 💯 See the complete year-end @billboardcharts here: https://t.co/UNqmUlLePw https://t.co/NWs164WBns" / Twitter](https://pbs.twimg.com/media/EoUjnQ2XMAEzjb2.jpg:large)