Robbie Williams recently returned with a new album
Robbie Williams is to appear on the final of The X Factor to perform with hopeful Olly Murs.
Joe McElderry will team up with George Michael, while female finalist Stacey Solomon will sing with Michael Buble in her bid to win the series.
Williams made his live comeback after a break of three years on an earlier edition of the ITV talent show.
The 35-year-old's performance of his single Bodies was criticised by some tabloid newspapers.
The star later revealed there had been a blunder directly before his performance when a stage door failed to open.
Stacey, Joe and Olly speak about their nerves
Speaking at a press conference in London before the weekend's conclusion to this year's series, judge Simon Cowell said the duets were a "very, very significant part of the competition".
He suggested that Beyonce's appearance with finalist Alexandra Burke "was a huge part of why I think Alexandra won".
Cowell, who devised the reality juggernaut, also promised "a few surprises" for this weekend's show.
Danyl Johnson became the most recent hopeful to be voted off the competition last Sunday, leaving the three remaining finalists to battle it out this weekend.
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