This is the “Deadmau5 vs. Fedde le Grand & Nicky Romero – Aural Spark” song’s mashup version by Hafez.
I was listened this song first time in “Natus Vincere – Goodbye” video by Monkey D. Key. But Na’Vi is now rebuilding… Here: http://goo.gl/28vqJG
For download this song: https://goo.gl/U8WdAs