Since Katy Perry came on the scene in 2008, she has been quite a conversation piece in the fashion world. Her signature style borders on outrageous, but she can also dial it down to demure and wear couture well for red carpet events. Whether you love her or leave her, you've got to admit that the girl's got gumption. Anyone whose wardrobe can go from glam to garish in the click of a stiletto is someone worth watching. Here are 10 fashion lessons we can learn from Katy Perry.