Gossip Girl rule #1: While back-stabbing, scheming, and participating in general debauchery, one must always be dressed to the nines. Ten years after the masterpiece show's premiere (yes, that's today—try not to feel old), Gossip Girl not only conjures up images of NSFW hook ups and heavy doses of teenage blackmail but also over-the-top fashun. From Blair's infamous headbands to Serena's high hemlines, Gossip Girl spawned many of our favorite '00s trends and helped many a private school girl reinvent her boring school uniform. But when it comes to our very favorite GG looks, only two women can hold the title of Most Memorable. Obviously, I'm talking about Serena Van Der Woodsen (Blake Lively) and Blair Waldorf (Leighton Meester). Sorry, Little J, your handmade dresses showed promise but don't quite make the cut here. Scroll down for S and B's best, most extravagant outfits that still inspire us.