for anyone who doesn't know galaxias!, they are a Japanese group consisting of singer/actress Kou Shibasaki, musician Deco*27 (He wrote many well known VOCALOID songs), and DJ Teddyloid (who made the Panty & Stocking with Garterbelt soundtrack)
Here's some footage of their concert in Shibuya: http://www.youtube.com/watch?v=QG9YQTFUhk0
And their website: http://www.youtube.com/watch?v=QG9YQTFUhk0
I got their album for Christmas this morning, and these guys make some pretty sweet music, my favorite song from them right now is 'future'.