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