Former X Factor winner James Arthur and chart topping sensation Ed Sheeran have been revealed as Week 5's guest stars.
Ed, who has recently recovered from a broken arm, will be singing single Perfect on Saturday's show.
James will sing new song Naked on Sunday evening's episode.
Meanwhile, the contestants left remaining on the show will be taking on their latest theme, 'Cool Britannia'.
It'll be the semi-finals and for the first time this year the acts will be performing all together as they go head to head.
Typically at this stage the contestants will be singing two songs each, although the song list has yet to be confirmed.
Whatever the plan is, pressure is on for the remaining acts with the final less than two weeks away.
Those with the lowest public votes will be leaving the contest immediately while the top performers battle will make the final at ExCel Centre.
Currently a total of 6 acts remain in the running to be crowned the winner of The X Factor 2017.
They are Simon Cowell's Groups Rak-Su and The CutKelvins, Sharon Osbourne's one remaining Girl Grace Davies.
Plus Louis Walsh's final Boy Lloyd Macey and Nicole Scherzinger's Overs Kevin Davy White and Matt Linnen.
The X Factor 2017 continues next Saturday at 7:30PM and Sunday night at 7:30PM on ITV.
The final will take place live on December 2 and 3.