Jonathan 'jb' Gill and Jls
Josh Cuthbert and Union J
Jj Hamblett and Union J
Next Aston Merrygold Slideshow: World premiere of 'One Direction: This Is Us' - Arrivals - - Tuesday 20th August 2013
Perry appeared on James Corden's 'The Late Late Show' on Monday and addressed her long-standing rivalry with Swift.