Teenage Dream is the third studio album by American singer Katy Perry. It was released on August 24, 2010, through Capitol Records. Musically, it contains pop and dance-pop with influences of disco, electronic, funk, house, gothic rock, Hi-NRG, and hip hop. Lyrically, it revolves around teenage love, partying, self-empowerment, and personal growth. Perry co-wrote every song on the album, and also worked with a number of producers and writers, including Dr. Luke, Max Martin, Benny Blanco, Tricky Stewart, StarGate, Greg Kurstin, and Ester Dean.

Upon its release, Teenage Dream received generally mixed reviews from music critics, who complimented its production and themes while denouncing Perry's songwriting. The album debuted at number one on the U.S. Billboard 200, selling 192,000 copies in its first week. It was later certified three times platinum by the RIAA; selling more than 3 million copies in the United States and charting within the Top 40 of the Billboard 200 year-end chart three years in a row. As of October 2013, Teenage Dream has sold 5.7 million copies worldwide. The album and its singles earned Perry seven Grammy Award nominations including Album of the Year, Best Pop Vocal Album, and Record of the Year, as well as winning International Album of the Year at the Juno Awards of 2011.

The album was preceded by the number-one singles "California Gurls" and "Teenage Dream", and later produced the number-one singles "Firework", "E.T.", and "Last Friday Night (T.G.I.F.)". Its sixth "The One That Got Away" peaked at number three on the Billboard Hot 100. Teenage Dream is the second album in history to have five number ones from one album (after Michael Jackson's 1987 album Bad), the first by a female to achieve this milestone and the third album in history to produce eight top five hits. All six of the aforementioned singles, in addition to two from its 2012 reissue, have sold over two million digital downloads each in the U.S., setting a record in the digital era for the most multi-platinum singles from one album, breaking the previous record of Fergie's debut album The Dutchess (2006), which had five multi-platinum songs.