History of Rap/History in Rap

That's Key and Peele doing the "Epic Rap Battles of History," Mahatma Gandhi vs Martin Luther King Jr. edition.  Pretty clever, pretty funny.

Slumdog zillionaire
First name Messiah
I rap so hot
I spit yoga fire

There are a lot more, from "Tolkien vs George RR Martin" to "Darth Vader vs Hitler"