With a wealth of chart-toppers and diamond certifications to her name, Katy Perry is one of the most internationally beloved American mainstream pop hitmakers of the early 21st century. Confident, fun, and armed with a winking sense of humor, she created a distinctly new millennial pop persona. In her early days, she tweaked the sensibilities of her audience with provocative late-2000s singles "Ur So Gay" and "I Kissed a Girl," which put her on the pop culture radar. She quickly moved beyond novelty and rose to the top of the charts by blending pop conventions with contemporar...