It's not every day that the woman with "the most spectacular cleavage in world cinema" invites you to help her choose a bikini. Yet somehow I find myself in the Eres boutique in Madrid, waiting for Penélope Cruz to emerge from a changing room. She and her almost identical younger sister, Mónica, are preparing to star in the music video for their brother, Eduardo's, new single—a Spanish-language rock anthem called "Cosas Que Contar." "We're going to be playing porn stars!" Penélope exclaims with wicked glee. Mónica throws a possible costume onto the counter. It's fire-red with a neckline that plunges south of the waist. "These are so expensive!" she whispers to her sister.

"Yes," Penélope replies, "but they make your body look fantastic."

"Made in Spain" has been edited for Style.com; the complete story appears in the December 2007 issue of Vogue.

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