All four categories have travelled across the globe to perform for their judges and guests – Simon Cowell took the overs to the South of France with Louis Tomlinson for help, and Cheryl Fernandez-Versini headed off to Rome with Jess Glynne and the groups.
Nick Grimshaw and the boys went to the Cotswolds and were joined by music super-producer Mark Ronson, and Rita Ora went off to Los Angeles with the girls and Meghan Trainor.
They'll all have to perform for their place in the live finals and then they'll head to the studio where they'll wait with Caroline and Olly to hear which three of them will be going through. The action continues tomorrow night when the finalists will be revealed.
The X Factor, ITV, 8pm
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