The Great Gatsby effectBaz Lurhann's Jazz Age film, The Great Gatsby, isn't released until January 2013, but it seems that '20s-inspired fashions are already having a moment on the red carpet. Katy Perry is the latest A-lister to embrace the flapper trend, wearing a vintage slip, strings of pearls and a finger-wave hair-do, at an event in Los Angeles. Click through to see more celebrities getting into the sartorial swinging spirit, and all the Gatsby film stills.