X Factor contestant Chris Moyles is in danger of damaging his voice.

The DJ's vocal coach spoke about her fears for the star in an interview with the Sunday Mail.

"I am worried that his voice is becoming strained," Yvie Burnett told the newspaper. "It's going to become more difficult for him as he has to do more serious numbers, which will really strain his voice.

"He might be stretching himself by getting up so early to do his radio show and then performing on Celebrity X Factor. I hope his voice doesn't suffer too much because I was surprised at how good he is."