After witnessing some shocking elements in the Six Chair Challenge, the audience saw two of their favourite acts leave "The X Factor" UK 2015.

Bupsi from Simon Cowell's OVERS was the first to leave the show after being placed at the bottom of the public vote. She performed "You're a Wonderful One" by Marvin Gaye in the Live Shows first week but it was not as good as her previous performances. May be she was given a wrong song.

The shocking element came when Olly Murs and Caroline Flack announced that Alien Uncovered from Cheryl Fernandez-Versini's GROUPS and Kiera Weathers from Rita Ora's GIRLS were in the bottom two, which meant they had to sing for the judges to survive in the competition.

Kiera Weathers, who performed "Crying for No Reason" by Katy B in the first Live Show night, probably deserved to get less votes as her performance was not great but Alien Uncovered gave a good show on Saturday, belting "Do It Like a Dude" by Jessie and their mentor gave them a standing ovation.

Alien Uncovered performed "The Pressure" by Jhene Aiko and Kiera rendered REM's "Everybody Hurts". Cheryl voted for her act but that as not enough to save them. Kiera won the survival battle.

Mentors Simon Cowell and Cheryl Fernandez-Versini are left with only two acts each in their respective categories, while Rita Ora has four, including wild card entry Monica Michael, and Nick Grimshaw has all his three acts intact in his BOYS category.