This is a guest post by Robin Clement of Street to Runway.

It’s happened for ages. You’re all set to hear a new song—whether it is illegally downloaded, from a CD, cassette or record—and just when you start groovin’ to the music, something hits you. Why does this sound so familiar? Ahah! The melody is just like that other song.

It turns out that composers have used a default tune, with the same chords. And now you’re about to see the many songs that have been written using the same music. Enjoy this discovery!