“Firework” is a song by American recording artist Katy Perry on her third studio album, Teenage Dream (2010). Perry co-wrote the song with it producers, StarGate and Sandy Vee, with additional writing from Ester Dean, making this the only single and one of seven songs from Teenage Dream to not be co-written or produced by Max Martin and Dr. Luke. The song is a self-empowerment anthem with inspirational lyrics, and was considered by Perry as the most important song for her on Teenage Dream.

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