“Firework” is a song by American singer-songwriter Katy Perry from her second mainstream studio album Teenage Dream. It was released as the third single from the album. The song was written by Perry, Stargate, Sandy Vee and Ester Dean, and it was produced by Stargate and Sandy Vee.
According to Perry, “Firework” is influenced by Jack Kerouac’s novel, On the Road. It peaked at number two on the Billboard Hot 100, becoming Perry’s sixth top ten single in the US. The song peaked at number three in the United Kingdom, where it has been certified silver for sales in excess of 200,000 copies.