Do Four Chords Make Up Every Hit Song?

Jay Frank takes the scholarly approach to dissecting hit songs in his Future DNA. Australian comedy group Axis Of Awesome prefer to go for belly laughs but along the way they make a rather convincing argument that that most of what's needed to write a hit is the same four chords.  A couple of the songs  were bigger hits downunder than elsewhere, but with the help of titles provided on screen, you'll catch on to the the band's premise quickly.