This should be on the Vocaloid spot. And I like the Vocaloid because of their uniquity (notice their items (i.e. Hatsune Miku = leeks) and the meanings of their names. Hatsune Miku means "first sound of the future", Kagamine means "mirror image", Rin means "right", and Len means "left") and their songs.
Well...I discovered them because I saw lots of pictures and assumed they were from an anime. I really liked their character designs and outfits, so I decided to seach for this phantom anime, and I finally figured out what they actually are. Now I'm a peminat of both the characters and the music!