"Birthday" is a disco song recorded by American singer Katy Perry for her fourth studio album, Prism (2013).It was written by Perry, Bonnie Mc Kee and producers Dr. Critics, as well as Perry herself, have compared the track to works by Prince and Mariah Carey.Through double entendres in the lyrics of "Birthday", Perry makes sexual references while celebrating a partner's birthday.
Following the release of Prism, "Birthday" entered the single charts of South Korea and France.
After being released as an official single, it reached the top 30 in Australia, UK, and Netherlands, number 17 on the US Billboard Hot 100 and number 7 on the Canadian Hot 100.
A music video for the track was released on April 24, 2014.
Primarily recorded with hidden cameras, it features Perry disguised as five different characters in birthday parties and other celebrations.
The makeup effects disguises for Perry were designed and created by Tony Gardner.
Jess Glynne covered the song on BBC Radio 1's Live Lounge."Birthday" was written by Perry, Bonnie Mc Kee, Cirkut, Dr. The latter three produced the song and contributed to the instrumentation and programmed their respective instruments.The drums were played by Steven Wolf, while the horns were played by the Saturday Night Live Band, arranged by Lenny Pickett and engineered by Dave O'Donnell.Its audio engineering was done by Peter Carlsson, Clint Gibbs, Sam Holland, and Michael Illbert.The track was finally mixed by Serban Ghenea at the Mix Star Studios in Virginia Beach, Virginia, accompanied by the mixing engineer, John Hanes.The song itself was recorded at various studios, including Luke's in the Boo in Malibu, California, Conway Recording Studios in Hollywood, California, Playback Recording Studio in Santa Barbara, California, MXM Studios in Stockholm, Sweden and Secret Garden Studios in Montecito, California.