X Factor: everything you need to know ahead of the final - rumours, guests, duets and more
Leona Lewis, Coldplay, One Direction and, oh yes, of course, the X Factor finalists will take to the stage at Wembley Stadium this weekend for the grand final of the ITV show, but the big news is the possibility that Reggie n Bollie may have to a ballad.
In previous years the last two acts remaining in the competition perform the winner's song in the final. It's the song the winner releases immediately after winning and usually sails straight to number one. This year it's Bob Dylan's Forever Young.
Will Reggie n Bollie be forced to sing a ballad?
It makes sense when two competent ballad singers a la Che Chesterman (19) and Louisa Jonson (17) are pitted against each other, as they may well be on Sunday night, but what if hip hop sensations Reggie n Bollie (age 31 and 28 respectively) make it to the final two, or indeed win?
They'll be forced to sing a ballad, which will make things very interesting.
Reggie n Bollie may need to tone down their act if they're tackling Forever Young
Final countdown disasters...
As usual, the final will run over two nights, Saturday December 12 and Sunday December 13, and the three finalists have spent the week campaigning Trump-like in their Battle Buses across the UK.
However, it hasn't been plain sailing. The Mirror has reported a bust-up between Reggie n Bollie's wives at one event, while favourite Louisa was forced to pull out of a Liverpool gig Radio City Christmas Live on Thursday on doctor's orders.
The 17-year-old, who is mentored by Rita Ora, was due to sing on the bill at Radio City Christmas Live alongside Olly Murs but was put on bed and voice rest ahead of the final.
However, today she's back on the Battle Bus, although presumably she's staying mute to save that precious voice.
Louisa back on the battle bus with Rita Ora on Thursday
Who will duet with whom?
Since Leona Lewis is confirmed to appear on the show it was rumoured she would duet with fellow female powerhouse Louisa. However, it has since been confirmed that the teenage star-to-be will perform with mentor Rita Ora on Saturday night. Although Adele may also be in the mix (see Musical Guests).
Leona won the show in 2006 and has since established a successful solo career, despite parting from Simon Cowell's Syco label. She will actually duet with last year's winner Ben Haenow on Saturday night's show.
Reggie n Bollie's duet partner has yet to be revealed. However, the duo have stated they'd like to perform with their mentor Cheryl Fernandez Versini, who recently joined them on stage to pull some moves.
However, last year's X Factor winner Fleur East has stated her interest in pairing up with the Ghanaian lads and the latest rumour is that reggae Sean Paul has been courted for the duty. Fueling the flames of speculation is the fact the duo posted a pic with the star to Twitter last month.
Che is the only act without a performing mentor - Nick Grimshaw would quite cut the mustard - so his duet partner has yet to be confirmed. Could it be Adele?
Leona Lewis performing on X Factor as a solo artist in 2013
Both Coldplay and One Direction will perform on the show on Sunday as the show celebrates 'the best of British music'. Both are plugging their respective new albums; A Head Full of Dreams and Made in the AM.
Adele has also been confirmed for Sunday night - she'll sing Hello.
Fleur East and fellow former X Factor winners Little Mix will also reportedly perform together on Saturday night's show.
Ben Haenow will perform his new single Slamming Doors on Saturday night.
Something of an X Factor reunion show so...
One Direction performing at the 2015 American Music Awards last month
Che's medley of Tears Dry on Their Own and Ain't No Mountain High Enough went down a storm.
Nick said it was her best performance and Simon called her 'one of the best we've ever had after she sang Who's Loving You in week 5.
Reggie n Bollie won Simon over with their Shut up and Dance by Walk the Moon mash-up wit Fuse ODG's track Dangerous Love.
What they're singing?
They'll each sing four songs. The first have been revealed. Louisa Johnson will sing Yolanda Adams' version of R Kelly's I Believe I Can Fly, Che Chesterman will sing Mark Ronson and Amy Winehouse's Valerie and Reggie n Bollie will do a mix - Spice Girls Spice Up Your Life and Outhere Brothers' Boom Boom Boom.
Who will win?
Neither Louisa nor Reggie N Bollie have faced the sing-off this series while Che has been in the bottom two twice.
He first faced off against Anton Stephans in week four and was saved by Cheryl, Nick and Rita Ora who all voted to send Anton home.
Che again faced the bottom two opposite Lauren Murray in last week's semi-final and when the vote went to deadlock, Lauren was sent home.
Che Chesterman has his work cut out for him this weekend
Louisa has certainly appeared to be Simon's favourite all along as he has regularly stated she's a star, has something special, and has not once offered any negative criticism of her performances.
However, it's entirely down to the public vote this weekend and much depends on how the acts come across in the cavernous Wembley Arena.
Our money is on Reggie n Bollie blowing the roof, but it looks like favourite Louisa Johnson could well be taking home the prize, especially if that rumoured Adele duet comes to fruition.
Simon Cowell has been hounding Adele to perform on the show