At OhayoCon, these girls (and their violinist, Issun) did a skit which won Honorable Mention in the Masquarade. Their skit was about Okami (which is a great game for those that don't know it). They danced while "Issun" played the violin and it was not faked. The song was the intro to Chrono Chross. I feel nerdy, but I recognized the song immediately when it was being played there. But it was amazing and should have gotten first. Sadly I couldn't find Issun to be in the picture.
Picture taken by me