What an amazing line up of mega stars!!, Michael Bublé and Robbie Williams will join George Michael to perform duets with the final three X Factor contestants this weekend.
The A-listers are expected to attract an audience of over 20 million and a show source said: “In previous years we have had some great acts but nothing beats having FOUR of the great male solo acts in one weekend.

According to The Mirror, Bublé will sing with Stacey Solomon, Michael will appear with Joe McElderry and Williams will perform with Olly Murs.

Williams and Bublé both appeared on The X Factor earlier in the series to mentor the contestants and promote their recent singles.

Paul McCartney is believed to be playing a solo song on the Sunday night of the two-day final.

A show source said: “In previous years we have had some great acts but nothing beats having four of the great male solo acts in one weekend.

“This has all the makings of the biggest X Factor show ever. It will be the only thing people will be talking about at work on Monday.”