The former X Factor 2009 runner-up and The Voice UK judge will be guest performers in a fortnight's time on the ITV1 series, according to fansite X Factor Updates.
The site has previously revealed that One Direction, Rihanna and Lady GaGa would perform on the show.
Xtra Factor host Murs will apparently move over to the main show to perform his track 'Dance With Me Tonight'.
Jessie J, who helped Tulisa Contostavlos choose the Groups at Judges' Houses, will sing her latest single 'Who You Are'.
The X Factor continues on Saturday at 8.15pm on ITV1.
> Rihanna, Rebecca Ferguson confirmed for 'X Factor' performances
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