Hahahahahahahahahahahahahahahahahahhahahahahahaha nyan cat is what I used to calm myself down when I couldn't sleep after reading a horror manga
Let me just go to my itunes and see.... Well, I always skip Sourire of Kanashimi. I can never seem to sit through it.
Oh, I still like it a lot! But must agree that most of the times a VOCALOID song turns so much popular, till the point of having lots of covers (and joke covers, remixes, etc..) it may get annoying. Like, it is great but it is everywhere everytime lolI'm really surprised no one has mentioned "Magnet" I mean it's basically a meme now