The X factor finalists are said to be furious that bosses have chosen the track Hallelujah as the winners single.

Diana Vickers performed this song earlier in the series to rave reviews and other singers feel that the song was picked with Diana in mind to win the show.

"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," a source told The Mirror.

"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."