I Bring Da LULZ is one of the earlier musicians in the fandom, dating far back. He's very well known for his pony parodies such as "Ponies" and "Pull Up To Da Target" and his original raps like "Dashie" and "Tracing Paper". In addition, he has put together lots of collaborative songs, notably the Pony Swag Megamix. He also frequently talks and works with Mic the Microphone. It appears like many artists he has pulled his videos from his youtube....
Notable Example: Dashie