Unless you've been living under a rock, you've no doubt heard of Rebecca Black's song Friday (see the original video here). Black's slightly annoying, but frakkin' catchy, tune is the most disliked video on YouTube and has spawned dozens (maybe even double-dozens!) parodies.
But this morning, YouTube user GinnyisaPrincess flat out owned any and all parodies I've seen thus far with her Harry Potter spoof called Ravenclaws.
What better line to get stuck in your head than: "What the Hell is a Hufflepuff?"