社交界デビューの季節がやってきた。デビュタント舞踏会に執着のないセリーナは出席しないことに決めていたが、生粋の“上流人”である祖母シシーは何としてもセリーナをデビューさせるべく、ある策略を練る。一方社交界デビューを夢見続けてきたブレアは、セオドア王子をエスコート役に決めていたが、ブレアへの思いを新たにしたネイトに押され、彼と出席することに。ネイトを牽制したいチャックは…。
ビング・クロスビー、グレース・ケリー、フランク･シナトラ主演映画「上流社会」 High Society（1956）を捩ったもの。
セリーナのドレスは Pamela Dennis Brocade Column Gown w/ Swarovski Topaz Crystals ブレアのドレスはスタイリスト、エリック・デイマンのオリジナルデザイン。
Manhattan Penthouse
80 Fifth Ave, New York
プレスコット・ダンス・スタジオのシーンはマンハッタン・ペントハウスで撮影。
脚 本：ジョシュア・サフラン
監 督：パトリック・ノリス
本日のパーティ： Cotillion Ball
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