'The X Factor UK' shake up: Brutal cuts made, judges' categories revealed
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“The X Factor UK” judges Simon Cowell, Louis Tomlinson, Robbie Williams and Ayda Williams were faced with a tough task in last night’s (Sept. 24) season 15 eighth episode which aired in the U.S. on AXS TV.

Over 130 hopefuls survived auditions (which wrapped this week) to advance to the next round. However, a new series shake-up means the bootcamp round is scrapped and the judges had to make brutal cuts by sending over half of the contestants home after watching the auditions in playback. This had to be a difficult process because there were many standouts who simply wouldn’t be making it through. Overall, 60 of them would survive and move forward.

Once decisions were made and the categories were formed, the judges waited to find out which groups they were going to work with. Ayda had repeatedly expressed her desire to work with the Overs category and Louis definitely wanted the Boys. As it turned out, they got their wish granted. Ayda has the Overs. Louis has the Boys. Simon has the Girls and Robbie will be mentoring the Groups.

Next week, the Six Chair Challenge begins in which contenders lay it all on the line for a chance to earn a place in one of six chairs, and eventually earn a trip to the Judges’ Houses round and hopefully, from there, on to the live shows. Per The Sun, the round has also reportedly been enhanced to include a Golden X which guarantees a hopeful a place in the next round – similar to the Golden Buzzer being pressed on “America’s Got Talent.”

No word has yet been given as to who the celebrity guest mentors will be for each of the judges in the Judges Houses’ round. Many One Direction fans are hoping Louis will recruit one of his former 1D bandmates for the job, but whether he’s decided to do this or call on someone else (like his "Just Hold On' collaborator, Steve Aoki), remains to be seen. He did, however, express his "confidence" in his category via Twitter and teased that Judges Houses will be "full of great vocals." (Read his post below).

“The X Factor UK” airs in the U.S. on Sundays and Mondays at 8 p.m. ET/5 p.m. PT on AXS TV.