SHE wore a Hello Kitty-bedazzled bustier to the Brit Awards, a

carousel-inspired skirt to the MTV Awards and channeled

Chiquita Banana at the Grammys. Forget being known as that singer who kisses girls — Katy Perry is a fashion icon. At her three sold-out shows at the Fillmore at Irving Plaza, inspired fans of all ages dressed up to get down, proving chic can be cheap. Who needs Cherry Chapstick when you’ve got shiny

sequined sneaks?