I was humming a rap song at work this morning, only it wasn't really a rap song. It was a Weird Al Yankovic cover/parody I saw on YouTube. Killing some time I watched a couple of his videos. The best wasn't based on a rap song. It was 'Bob', his version of Dylan's Subterranean Homesick Blues.
Here's Bob (the musician, not the song) and Subterranean Homesick Blues:
And here's Al singing Bob:
For the slow among you, all of the lines are palindromes.