The Prismatic World Tour was the third concert tour by American singer Katy Perry, in-support of her fourth studio album, Prism (2013). The tour began on May 7, 2014, at Belfast, Northern Ireland's Odyssey Arena and ended on October 18, 2015, at Alajuela, Costa Rica's Parque Viva after six legs. The Prismatic World Tour grossed more than $204.3 million from 149 shows, with a total tour attendance of 1,984,503 between 2014 and 2015; the tour is Perry's most successful, to-date.

Ebba Tove Elsa Nilsson, known professionally as Tove Lo, is a Swedish singer and songwriter. She has been called "Sweden's darkest pop export" by Rolling Stone. She is known for her raw, grunge-influenced take on pop music. Out referred to her autobiographical lyrical content as making her "the saddest girl in Sweden".