
It is performed by the very talented guys that are The Lonely Island. The guys are known for their skits and music parodies. They were eventually snapped up by SNL (Saturday Night Live) and also went on to make the film Hot Rod along with Will Ferrell.
Their music parodies have become so popular that it has led to the recording and release of their debut album Incredibad.
thelonelyisland.com official site: for news, merchandise and updates.
TheLonelyIsland Wiki entry: for background info about the guys.
TLI-Incredibad: Buy the debut album Incredibad on iTunes.