“Firework” was released on October 2010 for Katy Perry’s second studio album which was the third single from the album. 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. The song reached the top spot on Billboard Hot 100 and the top 5 on twenty charts around the world.
The music video was released on October 2010. It portrayed Perry singing and dancing around Budapest, with intercalating scenes of shy teenagers become confident in themselves.