Song of the Week - Mathematics by Mos Def
I love the concept of this song, every bar being presented in the context of math, numbers, and stats is really novel and I can't say I've seen anything quite like it before. His line delivery and rap flow is, as always, top-tier and really makes the cleverness of each line shine through. Mos Def is easily in my top 5.
Click on the song name to listen on various platforms (including YouTube where you can listen for free)