Blair wears this Tibi Dress on Christmas Eve with her family in “Roman Holiday,” Gossip Girl’s eleventh episode.

This Bop Basics Short Sleeve Crew Tee from ShopBop looks just like the one Serena van der Woodsen wears in “Blair Waldorf Must Pie!,” Gossip Girl’s ninth episode of season one.

Serena van der Woodsen is Rich and Skinny, and she certainly represents in a blue pair of these Rich & Skinny Sleek Jeans in “Blair Waldorf Must Pie!” Gossip Girl’s ninth episode of season one.