Every week, we bring you the best shoppable fashion and lifestyle stories from the editors at InStyle.com, including Nicole Richie's cold-weather obsession.

Between her multiple fashion lines, being a mother of two, and keeping up her avid social media accounts, Nicole Richie is one busy style-setter. We caught up with her (wearing a Lovers + Friends top and Holmes & Yang skirt) at the launch of the new Styletag app in New York City, where she talked to InStyle.com about her winter must-have this year. "A statement coat for sure," said Richie. "I always like a good winter coat." Her pick for this holiday season certainly stands out.

"I recently got a floor-length, faux fur Stella McCartney jacket. I usually splurge on one coat every winter, and that was it this year," Nicole told us exclusively, noting that it's her go-to item to add wow to any cold weather outfit (and it's available on stellamccartney.com).

In need of some more winter style inspiration? Styletag, available to download now, is your answer. The first app to bring street style and personal style together, Styletag makes every shared look shoppable. Fashion trend-setters and fresh new designers are able to curate their favorite looks and styles by building their own catalog of the latest trends, and you can too. Styletag empowers you to build your own personal look, allowing users to snap it, tag it, share it and buy it. "There's so many parts to how people are influenced by fashion," Richie told InStyle.com. "People are looking at street style, what people are wearing on the red carpet, what's on the runways. This app is great because you can choose what you're inspired by and follow that page. Then, you are actually able to buy what you see in the app."

Related:
Nicole Richie's Best Looks Ever
Go Inside Nicole Richie's Laurel Canyon Home
Fall 2013: 20 Coats to Change Your Life