Can you recognize this house song?

http://www.webspawner.com/users/impykills/index.html

The vocals are from David Guetta's Love is Gone. I heard it at a club (sorry about the crowd noises) but it's hard to hear it unless you turn it up. What is the melody in the background?
Thank you!

Aghh it's really familiar... could it be this one? Kalwi & Remi - Explosion http://www.youtube.com/watch?v=2SZDatZx0xE