Rita Ora And Kelly Clarkson For The X Factor Final
Pop stars added to line-up as final list of guests is confirmed...
Kelly is to perform on Saturday evening with Kylie and Rita - while the other acts will sing on the results show on Sunday.
But none of the special guests will be performing with the finalists this year. Instead the last three contestants will duet with their mentors.
We told you this morning how new judge Nicole Scherzinger is reported to have suggested that she might quit the show.