Rita Ora, Cheryl Fernandez-Versini, Simon Cowell and Nick Grimshaw have overcome the dramatic Six Chair Challenge and invited their categories to various locations for another set of auditions.
These auditions will prove to be the most important of them all, as they'll decide who will make it through to the live shows and who will be going home.
Rita took her Girls category to sunny Los Angeles, while Cheryl took her Groups to Rome.
Head judge Simon treated his groups to the scenic views of the South of France, while Nick took his Boys to Cotswolds.
Joining Rita was popstar Meghan Trainor, One Direction star Louis Tomlinson joined Simon, while Cheryl enlisted the help of singing sensation Jess Glynne, and Nick had the help of producer and DJ Mark Ronson.
A pretty star-studded line-up, right?
The guests were on hand to help the judges make the difficult decision of putting three of their six acts through to the live shows.
Despite the original plan being for Judges' Houses to be broadcast live from four different global locations, logistically, it was going to be too difficult to pull off.
Instead, Judges' Houses have been recorded and viewers will see this play out on the weekend shows. For the first time, the hosts have not accompanied the judges abroad, so Caroline Flack and Olly Murs have remained in the UK.
The final live show contestants will be revealed in a live show held at Wembley Arena.
Try Reveal's digital edition on iPhone & iPad. Subscribe now & never miss an issue!
X Factor's most shocking moments: