'X Factor' star Nicholas Dorsett has said that he believes that personal rivalries between the judges may be the reason that he was kicked out of the show at the weekend.

Dorsett was sent home on Saturday after Sharon Osbourne chose to save The Conway Sisters, who are Simon Cowell's act, over him when given the casting vote.

The 18-year-old singer said that he believes Osbourne's decision may have been connected to the fact that his mentor, Louis Walsh, voted her act, Maria, off the show last week.

"I cannot say I didn't think that. I would be lying if I did but at the end of the day Sharon made her decision and she is the only one that knows why she made that decision."

"It feels bad to be voted out because it would be good to make the final but I did not intend to win the competition," Nicholas said.

Meanwhile, Chico's odds for making the Christmas No.1 have been slashed to 16/1 after his performance of an original song, entitled 'It's Chico Time' on last weekend's show. He is now at the same odds as Robbie Williams to claim the Christmas top-spot.