But with the contestants just one song away from the Live Shows, will the pressure be too much to handle? Here is all you need to know about tonight's dramatic episode.
Last week's show saw Simon Cowell select four girls instead of three in a shock twist, after all impressing him at a concert held at his mansion in LA.
And tonight, its Robbie Williams' turn to narrow down his final six Groups to four, with a helping hand from BGT judge David Walliams.
The talent comes in thick and fast at his Beverly Hills pad, with Robbie close to tears at the LMA Choir's harmonic rendition of James Bay, and Vibe 5's emotional take on former winner James Arthur.
However, as Robbie notes both were nervous on the day, will he be swayed by Panda and Burgundy's powerful vocals, and Sweet Sense's girlband version of a One Direction classic?
Things are only confused further when A Star emerge with a remix of Soul II Soul, before Misunderstood wow with their original hip hop track and smooth moves, leaving Robbie at a loss over who to send home.
The drama doesn't stop there however, as Louis Tomlinson attempts to whittle down his Boys category after Robbie's decision is made.
The Doncaster native jets his hopefuls to Ibiza for a spot of sunbathing and race-car driving, before they knuckle down to work in front of co-judges Nile Rodgers, and his 1D bandmate Liam Payne.
Liam is immediately floored by Dalton Harris' impressive high notes as he belts out Beyoncé's Listen, while Nile is moved by the emotion in Anthony Russell's voice.
However, with Thomas Pound giving an energetic performance of One Night Only and J-Sol hinting at a hip hop future with his Rihanna classic, Louis is left with his head in his hands over the tricky decision.
But, will Armstrong Martins shake everything up with his twist on a famous TV theme tune, with one act still to perform?
Louis will finalise his category on Sunday night's show, completing the line-up for the exciting 2018 live shows at Wembley.
His wife Ayda Field will round up the Judges Houses round during the same episode, by choosing the best of the Overs category at their family home in LA.
Meanwhile Robbie's lucky four join Shan Smile, Scarlett Lee, Bella Penfold and Molly Scott, who Simon picked as his final girls last week.
The X Factor continues on ITV at 8:35pm on Saturday and 8pm on Sunday.
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