Alien Uncovered - xfactor Finalists seen drinking in there hotel bar before moving into the Xfactor House following getting through to the live shows. at xfactor - London, United Kingdom - Monday 26th October 2015 (3 Pictures)
View All: Xfactor Final 12 Seen Celebrating
Next Rochelle Wiseman Slideshow: Rochelle Humes arrives at the 'The X Factor' house - London United Kingdom - Monday 26th October 2015
Perry appeared on James Corden's 'The Late Late Show' on Monday and addressed her long-standing rivalry with Swift.