"Firework" is a song by American singer Katy Perry from her third studio album, Teenage Dream (2010). Perry co-wrote the song with its producers, StarGate and Sandy Vee, with additional writing from Ester Dean. It is a dance-pop and dance-rock self-empowerment anthem with inspirational lyrics, and was considered by Perry as an important song for her on Teenage Dream. The song was released on October 18, 2010 by Capitol Records as the third single from the album.