Mreh.
It wasn't bad, but I don't think it's front page worthy. I do like South Park, but all this was doing was taking a song from there and putting very simple animations to it. There was very little animating and almost no creativity on your part. I'm not sure whether you actually even made the graphics or took them from a South Park "Dress-up" game.
In any case, there were also some flaws. When the guy on the left was mimicking what she was singing, you could distinctly hear both of them laughing.
Other than that, it wasn't too bad. Come up with your own jokes, etc. and I'll be sold on it.