What earworm songs are burrowing through your head today?

[BigV]

SonofV and I went to Sakura-Con recently and I spent a lot of time in the AMV Theater. This was one of the best I watched, and the song's been stuck in my head ever since. I have not played Portal (so no spoilers, *please*), but I do know a little about the storyline. And I've heard the original song (which I find catchier, but this one had lyrics that I could understand for the first time, the captions helped). The marriage of the story of L and Light in Death Note along with the words from the song is a HUGE SUCCESS! I'm being so sincere right now.