Nathan Lee Graham - Oscar Salute hosted by Kevin Hart, Powered by Maserati held at the W Hollywood Hotel - Arrivals at The W Hollywood - Los Angeles, California, United States - Sunday 28th February 2016 (1 Picture)
Nathan Lee Graham
Photo credit: Tony Forte/WENN
Next Nathan Lee Graham Slideshow: 'Zoolander 2' World Premiere - Arrivals - New York New York United States - Tuesday 9th February 2016
Perry appeared on James Corden's 'The Late Late Show' on Monday and addressed her long-standing rivalry with Swift.