Sung by the X Factor winner. :( Causing a right storm according to this-

"The X Factor finalists are reportedly 'furious' that a song performed by Diana Vickers in Boot Camp has been chosen as the winner's single.

The remaining acts are angry that bosses have selected the song 'Hallelujah' to be released by this year's victor, according to The Mirror.

Judge Louis Walsh told Vickers she had "made the song her own" after she performed it earlier in the competition.

"Tempers are running high. They feel it is just the latest in a series of stunts that have left them wondering if the competition has already been won," said a source.

"Many suspect producers are paving the way for Diana to win and there is nothing they can do.

"They feel even if the public put her in the bottom two, the judges will always save her."

The competition winner will perform the Leonard Cohen track during the final show. The single will be released on December 15."