From a blog a frequent comes the discussion of plagiarism of music and how easy it is to subconsciously 'make up an old song' because of the fact that there are only 7 whole notes, forming 4-chord rock, which makes up a majority (if not all) of the popular rock songs of the past 50-60 years.
The Axis of Awesome
finally refers to a comedy band that put that to the test on youtube.
Quite interesting... especially as I'm just getting back into music. And also quite hilarious. And ... awesome.