Miss Australia , Monika Radulovic - Miss Universe 2015 National Costumes at The AXIS at Planet Hollywood Resort & Casino Las Vegas at The AXIS, Planet Hollywood - Las Vegas, Nevada, United States - Wednesday 16th December 2015 (1 Picture)
Miss Australia and Monika Radulovic
Photo credit: Judy Eddy
View All: Miss Universe 2015 National Costumes
Perry appeared on James Corden's 'The Late Late Show' on Monday and addressed her long-standing rivalry with Swift.