SOUNDTRACK - PLEASE HELP!

There is this great, catchy song in the disco where the woman disappears... It is a mixture of Electro / Techno / House... I haven't been able to find out the name of the song so far. Can anyone help?

You can here the music on the main menu of the dvd, too!

There is a female voice, it is something like "ahh, ohhhh..." I know, that sounds stupid and strange but if you hear it, you will recognize it! :)