Take That are to perform 'Rule The World' alongside the three finalists on this weekend's upcoming X Factor finale.
Gary Barlow, Howard Donald and Mark Owen will take to the stage with Fleur East, Ben Haenow and Andrea Faustini.
A show insider told the Daily Mirror newspaper: "It's really unusual for producers to team up the final three contestants, as this is when they stand or fall as individuals.
"But they wanted to spice things up. So rather than having them sing two songs each and a duet, they'll each be performing a duet and then this collaboration."
The wannabe popstars are to join the remaining members of Take That for a special rendition of their 2006 hit single, which they also sang at London's Olympics closing ceremony.
"It's bound to go down really well with the audience at the arena and will make great TV."
Take That will face a race against time getting to the show however, as they'll be travelling from a gig in Berlin, Germany.
"It's going to be a race against the clock to make it to London. They cannot be delayed for a second, so they're going to have a very nervous team around them as they rush to their private jet."
One Direction, Ed Sheeran, Sam Smith and 'All About That Bass' hitmaker Meghan Trainor are also set to perform duets with the final contestants over the weekend.
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