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Perry told Billboard that the inspiration for the song came from an unlikely source. "My boyfriend showed me a paragraph out of Jack Kerouac's book On The Road, about people that are buzzing and fizzing and full of life and never say a commonplace thing. They shoot across the sky like a firework and make people go, 'Ahhh.' I guess that making people go 'ahhh' is kind of like my motto." ( Firework Songfacts).