I found this via Facebook. One of my friends sent this to me and I laughed so hard I watched it 3 times in a row. See, if you’re a musician as I am, you know that music is just a bunch of patterns. It’s mathematical, really. So it’s not all that unusual for “progressions” to repeat or be duplicated between songs. It’s unintentional mostly, but thats the nature of patterns.
Apparently, everyone loves the Canon in D patterns. ;-)