I always love watching fan communities for specific videogames. The conversations, speculation and other random works that come out of them are usually sights to behold, even if you might not know all the backstory.
League of Legends is no exception. I recently stumbled over a fan band named Plenta Kill that's been making League of Legends-themed spoofs of other popular songs. They've made a small collection of tracks based on LoL champions so far, but my favorites have to be the Caitlyn-centric "Teleport" and the Leona-themed "Till the Game Ends."
You can check them out on the band's YouTube channel.