Hi!
Well I love Trance music, especially this one.
I had some difficulty to transcribe the rapid melody in the background, when the girl sings. Here it is for you.
Note: I transcribed from the 540th episode of A state of Trance, so I hear it in C major. But on the youtube video, it's 1/2 tune below (B major).
Sorry I don't have the time to transcribe more completely... If you want, the chords are C G/B Am F (classic, very classic pattern!)
Have fun :)