Happy Birthday Katy Perry! The “Firework” Singer is 39 today and has been gifting us with hits since 2008. Aside from her music career Katy is a current judge on American Idol, the voice of Smurfette in the Smurfs movies, and working on a new character for Peppa Pig. Katy Perry is one of Forbes’ Top Earning Women In Music and we look forward to seeing what’s on the way from her!