Heh, I just this afternoon listened to a radio show about the famously popular vi-IV-I-V/I-V-vi-IV chord progression [1]. If you haven't heard it before, the "4

Heh, I just this afternoon listened to a radio show about the famously popular vi-IV-I-V/I-V-vi-IV chord progression [1]. If you haven't heard it before, the "4 Chords" medley by Axis of Awesome is a great demonstration of its ubiquity [2]. [1] https://en.wikipedia.org/wiki/I%E2%80%93V%E2%80%93vi%E2%80%93IV_progression https://en.wikipedia.org/wiki/I%E2%80%93V%E2%80%93vi%E2%80%9... [2] https://youtu.be/oOlDewpCfZQ https://youtu.be/oOlDewpCfZQ