Epic Rap Battles of History is a Youtube sensation by Nice Peter and Epic lloyd. The whole concept is that the watchers can suggest two persons that they want to see in a rap battle. In the videos they have for example featured Barack Obama vs Mitt Romney, etc.. Nice Peter and Epic Lloyd Ahlquist are usually acting the characters, yet they've had numerous guests like DeStorm and MC Mr Napkins. You can see what they have done on their website http://www.epicrapbattlesofhistory.com/