Competition is getting tougher over the weeks with the number of contestants in "The X Factor" UK 2015 dwindling as the show progresses. Only 24 of them were selected during the Six Chair Challenge, which runs for three weeks and they are all set to compete against each other again.

Spoilers:

Also Read

Top 24 finalists will return to the stage again after surviving the Six Chair Challenge with the hope of progressing to the live shows. They will perform at the judges' houses in two episodes this weekend.

Each of the mentors -- Cheryl Fernandez-Versini, Simon Cowell, Rita Ora and Nick Grimshaw -- can select only three acts each to represent their respective teams in the live shows. That means a total of 12 contestants/acts will be sent home during the performance at judges' houses.

Interestingly, the names of Cheryl's GROUPS have been changed, and it is perhaps spurred by copyright issue in connection with 4th Power, which is now renamed to 4th Impact. Other groups -- Alien ( now Alien Uncovered), BEKLN to BEKLN Mile, Silver Tone to Melody Stone, The First Kings to New Kings Order, and Menn on Point to Reggie n Bollie.

Nick Grimshaw, who got the BOYS, has Ben Clark, Che Chesterman, Josh Daniel, Simon Lynch, Mason Noise and Seann Miley Moore in his team. Interestingly, Mason -- who was sent home after getting into an argument with Simon Cowell during Six Chair Challenge -- has been brought back to the show after Tom Bleasby pulled out of the competition.

Rita Ora has Louisa Johnson, Chloe Paige, Monica Michael, Havva Rebke, Kiera Weathers and Lauren Murray in her GIRLS category, while Simon Cowell has Anton Stephans, Bupsi, Ebru, Jennifer Phillips, Kerrie-Ann Phillips and Max Stone in the OVERS category.