Sittin' on Top of the World

I think this is the quintessential blues song. I personally think that's Taj Mahal's version is the best.

I believe the lyrics reference a drug or alcohol addiction. Each verse talks about how bad something is, and then states, "I ain't worried, I'm sittin' on top of the world."

Worked all summer
Worked all fall
I spent my Christmas
In my overalls
But now you gone
I ain't worried
I'm sittin' on top of the world