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423 ตอน
The X Factor - Season 5 Episode 17
Down to nine acts and the contestants must sing again for a place in next week's show. This week they must sing classic disco songs for the judges and the viewers at home. The viewers will then vote for their favourite and the two acts with the lowest number of votes will be forced to sing again for the judges who will then decide to save one act.
- ประเทศ : United Kingdom
- ประเภท : Reality
- ผู้อำนวยการ : Simon Cowell
- นักแสดง : Dermot O'Leary, Simon Cowell, Ayda Field, Robbie Williams, Louis Tomlinson