Comment by bambax

The obligatory video is of course "Four Chords" by Axis of Awesome:

https://www.youtube.com/watch?v=5pidokakU4I

Rick Beato has kind of the opposite video about "the most complex song ever":

https://www.youtube.com/watch?v=ZnRxTW8GxT8

The song in question is Never Gonna Let You Go by Sergio Mendes; plenty of videos exist of it; here's one live:

https://www.youtube.com/watch?v=fOPh3bTglak