Hallelujah is the Debut single of Alexandra Burke, X-Factor Winner 2008
The song is a cover, original version by Leonard Cohen. Successful in 1994 by Jeff Buckley's version.
According to the Hallelujah Songfacts, this was chosen as the X-Factor winner’s debut single, after Simon Cowell noticed the enthusiastic reaction that American Idol Jason Castro received when he performed this song during one of the heats.
I heard there was a secret chord
That David played and it pleased the Lord
But you don't really care for music, do ya?