Has every popsong ever been already written?

Axis of Awesome: Four Chord Song 2009, Four Chords 2011.

BennyThe Jukebox: Another Four Chords and Six Chords. He writes: “More songs that sound alike to me. My next video will be called Seven Chords; it will feature every song ever.”

This hasn’t been a recent trend, it started all the way back in the 18th century with Georg Friedrich Händel, as proven by the Ukulele Orchestra of Great Britain with their song Fly Me Off The Handel.