London boyband JLS are set to duet with US star Rihanna for Saturday's live X Factor final.
Bookies say the four-piece are still third favourites to win the competition, but odds have been slashed since the announcement this morning (11 December).
A show insider said: "They are thrilled to be working with Rihanna. It is a massive coup.
"She has an incredibly wide fan-base which is bound to help pull in votes. The feeling is that Rihanna's backing is the clincher. Even Simon Cowell has admitted they could win."
Favourite Alexandra Burke is due to perform with Irish quartet Westlife, while Eoghan Quigg has been teamed up with reformed manband Boyzone.
Bookies say the four-piece are still third favourites to win the competition, but odds have been slashed since the announcement this morning (11 December).
A show insider said: "They are thrilled to be working with Rihanna. It is a massive coup.
"She has an incredibly wide fan-base which is bound to help pull in votes. The feeling is that Rihanna's backing is the clincher. Even Simon Cowell has admitted they could win."
Favourite Alexandra Burke is due to perform with Irish quartet Westlife, while Eoghan Quigg has been teamed up with reformed manband Boyzone.
