Ever stared at someone, trying to pinpoint what it is that makes them so chic? When it’s not as obvious as a designer slip-on, it can be hard to decipher exactly what was mixed and matched to create the covetable finish. Enter our new series, Mix Masters, dedicated to cracking the style code of our favorite It girls. We’ve teamed up with 7 for All Mankind to ensure that we address the one thing we all wear on rotation: denim. One by one, we’re getting inside the fashionable minds (and dramatically different wardrobes) of these style stars—and we won’t rest until they’ve spilled the secrets to mastering their look.