Prism (Katy Perry album)

Prism is the fourth studio album by American singer Katy Perry. It was released by Capitol Records on October 18, 2013. While the album was initially planned to be "darker" than her previous material, Prism ultimately became a prominently dance-inspired record. Perry worked with several past collaborators, while enlisting new producers and guest vocals. Much of Prism revolves around the themes of living in the present, relationships, and self-empowerment. The album garnered generally positive reviews with critics praising its lyrics for being more "mature" and personal, while others considered Prism to be more formulaic than her previous output.

Prism charted at number one in Australia, Canada, Ireland, New Zealand, the United Kingdom, and the United States. It became Perry's fastest-selling album, the second best-selling album in Australia in 2013, and the second best-selling album released by a woman in the United States in 2013. The International Federation of the Phonographic Industry (IFPI) reported that Prism was the sixth best-selling album in the world in 2013, the best-selling album in the world in 2013 released by a woman, and labeled Perry "a global phenomenon." It has sold over 6 million copies worldwide and has received multi-platinum certifications in Australia, Austria, Canada, Colombia, India, Indonesia, Mexico, New Zealand, Norway, the Philippines, Poland, Thailand, and the United States. The album additionally was nominated for Best Pop Vocal Album at the 57th Annual Grammy Awards.

"Roar" was released on August 10, 2013, as the album's lead single and topped the US Billboard Hot 100. A second single, "Unconditionally", debuted on October 16, 2013 and reached the top 10 in Italy. "Dark Horse" followed as the album's third single three months later on December 17, 2013, and also reached number one in the United States. "Birthday" and "This Is How We Do" were the fourth and fifth singles, respectively. The track "Walking on Air" was also released as a promotional single. Prism was further promoted through the Prismatic World Tour. A concert from the tour would eventually be released as The Prismatic World Tour Live in 2015.