It may not be quite early enough to start singing holiday songs or compiling your gift wish list, but the party season has certainly begun and—spoiler—isn't going to be over until New Year's! Now, as fun as that sounds, it's hard to keep up that party dressing stamina for nearly two months straight! For fashion lovers, Gossip Girl ranks high in its wardrobe inspiration, among the likes of Sex and the City and The Devil Wears Prada. While Blair Waldorf and Serena van der Woodsen party-hopped…