It is! It is! Most of my friends don't like vocaloids or they like vocaloid songs but only the utattemita versions of them (I think that's what it's called because dance covers are called yattemita (again, I think)).
IA's costume is definitely very different and I like it so much!! Come to think of it, I'm fairly sure that IA's costume is one of my favourites actually, along with SEEU's. I also hope to cosplay as both of them for Anime North (Canadian anime convention) next year!