Katy Perry Discusses Evangelical Childhood, Term 'Deviled Eggs' Banned from House". Billboard. May 4, 2011. Archived from the original on March 22, 2014 . Retrieved February 6, 2014. Clarke, Betty (October 1, 2013). "Katy Perry– review". The Guardian. Archived from the original on February 23, 2014 . Retrieved February 5, 2014. With more than 18 million albums and 125million singles sold globally, Perry is one of the best-selling music artists of all time. [452] [453] Perry was declared the Top Global Female Recording Artist of 2013 by the International Federation of the Phonographic Industry (IFPI). [180] According to RIAA, she is the ninth top digital singles artist in the United States, with 112 million certified song units in the country including on-demand streams [454] and also has 17.5 million certified album units, totaling 129.5million certified units in the United States. [455] She also became the first artist to have three songs receive Diamond certifications from the RIAA in 2017 with "Dark Horse", "Firework", and "Roar". [456] All three of them and "E.T.", "California Gurls", and "Hot n Cold" have each sold over 5 million digital copies. [457] Six years later, the RIAA certified "California Gurls" as her fourth diamond-certified single in the U.S., breaking her tie with Lady Gaga as the female artist with the most diamond singles there. [458]

Rutherford, Keith (December 11, 2011). "Katy Perry Hosts 'SNL': The Hits & Misses, Including a Florence Welch Spoof". Billboard. Archived from the original on August 21, 2013 . Retrieved August 8, 2013.Lyons Powell, Hannah. "Katy Perry's Changing Style and Fashion". Glamour. Archived from the original on February 19, 2014 . Retrieved February 6, 2014. a b c d "Katy Perry– Chart history: Billboard Canadian Hot 100". Billboard. Archived from the original on June 29, 2014 . Retrieved June 26, 2014. Kaufman, Gil (August 26, 2010). "Katy Perry, Fantasia look to unseat Eminem on charts". MTV News. Archived from the original on March 30, 2016 . Retrieved February 28, 2016. Merritt, Stephanie (September 14, 2008). "Pop review: Katy Perry, One of the Boys". The Guardian. Archived from the original on August 10, 2014 . Retrieved August 6, 2014. Gundersen, Edna (October 22, 2013). "Live stream: Katy Perry's 'Prism' album release party". USA Today. Archived from the original on March 30, 2014 . Retrieved May 22, 2014.

Sinha, Charu (May 7, 2023). "Katy Perry 'Roar's at the British Public During Coronation Concert". Vulture . Retrieved May 9, 2023. Barrett, Annie (January 27, 2010). " 'American Idol': The Kara vs. Katy Lifetime movie". Entertainment Weekly. Archived from the original on July 14, 2014 . Retrieved April 29, 2014. Robin, Marci (August 14, 2019). "Fans Are Defending Katy Perry After a Model Accused Her of Sexual Misconduct". Allure . Retrieved November 23, 2021.The Sims 3 Katy Perry's Sweet Treats". Electronic Arts. Archived from the original on January 6, 2015 . Retrieved April 3, 2014. Michaels, Sean (July 30, 2013). "Katy Perry announces new album, Prism, on side of golden lorry". The Guardian. Archived from the original on August 19, 2016 . Retrieved June 20, 2016. a b Zemler, Emily (March 27, 2015). "Katy Perry Premieres Concert TV Special, Explains Why Pop Stars Should Always Play Their Hits". Billboard. Archived from the original on July 11, 2015 . Retrieved July 19, 2015.

Bell, Sadie (June 15, 2017). "Katy Perry's Witness World Wide Generated Over 49 Million Views". Billboard. Archived from the original on June 15, 2017 . Retrieved June 16, 2017. Hot n Cold". Rolling Stone. July 30, 2014. Archived from the original on November 8, 2014 . Retrieved October 24, 2014.The Smurfs 2". Rotten Tomatoes. July 31, 2013. Archived from the original on January 6, 2014 . Retrieved January 16, 2014. Kaufman, Gil (September 27, 2010). "Katy Perry to appear on 'The Simpsons' in December". MTV News. Archived from the original on November 7, 2012 . Retrieved August 19, 2011. Danton, Eric R. (August 13, 2013). "Listen to John Mayer's 'Paradise Valley' Now". Rolling Stone. Archived from the original on August 16, 2013 . Retrieved August 13, 2013.

The Smurfs". Rotten Tomatoes. July 29, 2011. Archived from the original on January 11, 2014 . Retrieved January 16, 2014. Pietroluongo, Silvio (December 8, 2010). "Katy Perry's 'Firework' Shines Over Hot 100". Billboard. Archived from the original on February 12, 2013 . Retrieved December 8, 2010.Howard, Hilary (November 17, 2010). "Beauty Spots". The New York Times. Archived from the original on September 8, 2014 . Retrieved August 22, 2014.