One day, Katy Perry was hanging out doing a photo shoot for Rolling Stone in April of 2010 when she said out loud: "It's so great that 'Empire State of Mind' is huge and that everyone has the New York song, but what the fuck? What about LA? What about California? It's been a minute since we had a California song and especially from a girl's perspective. We took the references of Prince, which is always a great reference, and some of the '90s, almost house music references." DON'T MISS Fact...Read Full Story