Last night’s sixth and final season premiere marked the beginning of the end for Gossip Girl’s fashionable Upper East Siders. The drama is heating up once again—and so is the fashion. Serena van der Woodsen (Blake Lively), masquerading as "Sabrina," wore a gorgeous lemon silk chiffon Jenny Packham dress, while Georgina Sparks (Michelle Trachtenberg) worked a gray Joie tank and statement necklace. Meanwhile, Blair Waldorf (Leighton Meester) sported some knockout accessories, complementing her ensemble with a python Fendi bag. For more looks from the new episode, titled “Gone Maybe Gone,” click through the gallery. Catch Gossip Girl every Monday at 9/8c, and check back on news.instyle.com to get all the weekly fashion credits.