結婚式を数日後に控えたブレアのバチェラー・パーティーが開かれようとしていた。ベアトリスはブレアに協力するフリをして、ある計画を企てる。一方、ネイトはゴシップガールとある取引をする。
ゲスト：アーロン・トヴェイト『レ・ミゼラブル』、ジェイムズ・ノートン「アリーｍｙラブ」、ジョナサン・カープ[Simon & Schuster 出版/本人役]
脚本：ピーター・エルコフ
監督：エイミー・ヘッカリング
音楽："Bells" by The Naked and Famous / "Brains!!!!" by Hollywood Holt / "This Road Is Long" by The Lost Patrol / "Party Rock Anthem" "Sexy and I Know It" by LMFAO / "Cradle (Fang Island Remix)" by The Joy Formidable
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