Ok, so we've heard songs about robots before, but unless you happen to be a fan of Flight of the Conchords, perhaps you haven't heard this one - "The Humans are Dead". Sung from the point-of-view of two conquering robot overlords, it's a clever and distopian view of our future.
Oh, and be sure to catch the "binary solo". It's a classic.
[youtube http://www.youtube.com/watch?v=WGoi1MSGu64&hl=en&fs=1]