Our favorite fall looks are captivating and modern—but whether you’re playing dress up with vintage clothing or getting ready for a big night out, there’s nothing more fashionable than spending some quality time with your best friend.

In some ways, sisters Knewdles and Sos have what is possibly the most typical sibling relationship in the world—they fight, they squeal on each other, but they also are closer than ever. Yet most sisters don’t grow up, move in together, and decide to start a hip-hop group of their own.

This winter, flaunt your figure in the best styles for your body type.

On Gossip Girl, Nelly Yuki is perhaps the most complex character in the it-girl group. We’ve seen her buried behind her books, acting in a fat suit during the school play, using the girls against one another to climb the social ladder, and, in the finale, hitting on our dream boy Dan Humphrey after one too many drinks. Mochi meets Yin Chang, the actress behind Nelly Yuki, for the scoop on what goes on behind the scenes, from the casting office to the infamous fashion closet.