Haha, Love it!
Great job on this! The song is great and it suits the character!
But I've spotted a few minor problems that you could look into fixing sometime later.
Okay, First of all his head goes a little too slow when he sings, it doesnt suit the Southpark canadian layout. Make his head a little more... 'jumpy' and make the head 'jump' a few frames as he says the quicker stuff. It is well animated and timed, though. Very smooth. You dont see a high frame rate often :).
Anyways... On to the graphics, style, sound and whatnot.
Graphics:
*Claps*
Well done! Even though the charicter is only made up of shapes. Hes well put together and keeps in place when he is animated, limbs dont start falling off a little.
Style: I gave a five for... Well, First; the character kyle was based on the south park theme. minus Three points.. and using the sprites and background from Mario, Minus another three points.
Yet, it did suit the animation in a way.
Sound: Perfect sound quality. none of that dull shit you usually come across. The song is catchy too.
Violence : Other than the guy kicking the turtle shell. Im giving violence a 0.
Humor: Well, The song was quite random and humorous, aswell the SP Canadian for the singer, Oh.. that dance too XD, That cracks me up!
And overall: A nine.