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Kym Marsh has criticised Cheryl Cole's decision to sit on the fence during the X Factor vote.
The Coronation Street star, who rose to fame on a TV talent show, says "a judge's job is to judge".
Cheryl's refusal to vote cost contestant Treyc Cohen a place on the show and saved Katie Waissel who was less popular with viewers.
If she had voted for Treyc, the decision would have been thrown over to the votes of viewers.
Kym said: "I do think she should have voted. It could potentially have changed the whole outcome, and fans of Treyc are probably fuming.
"You can see why people are annoyed. I do believe she should have chosen because if you're going to be a judge your job is to judge. Whether that's your own acts or someone else's, in my opinion that's what she should have done."