Popsugar Fashion Best Friends Blair and Serena's Coordinated Outfits on Gossip Girl All the Times Blair and Serena's Coordinated Outfits Made Them TV's Most Stylish BFFs 21 May 2020 by Nikita Charuza View On One Page Photo 11 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 11 Summer Dresses and Flats There's nothing better than wearing coordinated summer dresses with flats. Previous Next Start Slideshow Best FriendsScreen StyleNostalgiaGossip GirlLeighton MeesterBlake Lively