Katy Perry, born on October 25, 1984, is an internationally acclaimed American singer, songwriter, and television judge. Rising to fame with hits like "I Kissed a Girl" and "Firework," Katy has become a pop sensation known for her catchy tunes and elaborate stage performances. In addition to her music career, Katy Perry has served as a judge on "American Idol" and is recognized for her philanthropy and activism on various social issues.