Katy Perry is now 33 years old, and she remains one of the biggest pop stars of the digital era. Katy has many certified multi-platinum hits that have topped the Billboard Hot 100. "I Kissed a Girl" put Katy on the map, becoming her breakthrough #1 pop hit. "Firework" has gone on to become an inspirational anthem; the song is also regarded as one of Katy's five #1 hits from her magnum opus "Teenage Dream." Which smash is Katy's best? 🎤
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