Nicole Richie is back, with a fashion vengeance. Not that she ever left, really. Leave it to Nicole to bust out bubble shorts just weeks after having her second babe. Here she is leaving a Selena Gomez concert in LA looking every bit the fashion-forward mom. If you've got the gams, go for the bubbles. Make sure you leave everything else easy and sleek, like Nicole, and the color palette simple. Tossing a vest on is a smart addition, and heels will maximize your leg appeal.