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| Birthday | |||||
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| Birthday cover | |||||
| Single by Katy Perry | |||||
| Album | Prism | ||||
| Released | April 21, 2014 | ||||
| Genre(s) | Disco | ||||
| Length | 3:35 | ||||
| Label(s) | Capitol | ||||
| Songwriter(s) | Katy Perry, Dr. Luke, Max Martin, Bonnie McKee, Cirkut | ||||
| Producer(s) | Dr. Luke, Max Martin, Cirkut | ||||
| Katy Perry singles chronology | |||||
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| Music video | |||||
 "Birthday" on YouTube |
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- For other uses, see Birthday
"Birthday" is a song recorded by American singer and songwriter Katy Perry. It was released on April 21, 2014 by Capitol Records as the fourth single from her fourth studio album, Prism.