BELFAST, UNITED KINGDOM – MAY 07: Katy Perry performs on stage on the opening night of her Prismatic World Tour at Odyssey Arena on May 7, 2014 in Belfast, Northern Ireland. (Photo by Christie Goodwin/Getty Images)
BELFAST, UNITED KINGDOM – MAY 07: Katy Perry performs on stage on the opening night of her Prismatic World Tour at Odyssey Arena on May 7, 2014 in Belfast, Northern Ireland. (Photo by Christie Goodwin/Getty Images)