This is a trance remix of "starry heavens" by Day After Tomorrow. I don't recognize this particular remix, I've only heard the original version of the song. (BTW calico go you on your old-school misono guess. Good ears!
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A quick google shows something called the "DJ UTO MYSTERIO remix" which might be this, lemme check...
...Yup!
http://www.youtube.com/watch?v=zAD-LWY2RZg More info on the track is in the info box here.