SHOPGIRL: As if Chanel Iman didn’t already have the most coveted designer duds at her disposal. Now that her mother, China Robinson, has opened a clothing shop called the Red Bag Boutique in Culver City, Calif., the young model can get her pick of the latest contemporary fashion. “Everything I’m wearing is from my mom’s store,” said Iman, epitomizing boho sassy chic in a sheer white vest festooned with beads, ultrashort denim cutoffs and embellished stiletto sandals at Armani Exchange’s carnival-themed party on Saturday in Thermal, Calif. Although she said she has no intention of designing clothes, all those hours collaborating with designers will come in handy when she helps style the clothes and assist shoppers at the store. Talk about a model daughter.