“Firework” is a song by American singer Katy Perry from her third studio album, Teenage Dream (2010). Perry co-wrote the song with Ester Dean and its producers StarGate and Sandy Vee.
It is a dance-pop self-empowerment anthem with inspirational lyrics, and Perry felt it was an important song for her on “Teenage Dream”.
The song was commercially successful, reaching number 1 on the Billboard Hot 100 and the top five on 20 charts around the world. It has sold 7.1 million copies in the United States, and over 1 million in the United Kingdom.