This one is two songs stitched together. Belén Aguilera takes the old Spanish legend from "Hijo de la Luna" [son of the moon], the story of a gypsy woman who begs the moon for a husband, and folds it into her own song "Vértigo" [vertigo]. The legend opens with "Cuenta una leyenda" [a legend tells] and a deal: the moon grants her "tu hombre piel morena" [your dark-skinned man], but wants "el hijo primero" [the first child] in return. The word calé in "desposar un calé" [to marry a calé] is the Romani word for a gypsy man.
Then the song swings into the present and gets much more personal. She says "Yo soy de emociones fuertes" [I'm into strong emotions] and "La calma me vuelve demente" [calm drives me crazy], and she's tired of "ser valiente" [being brave]. The chorus asks for "una noche que sea eterna" [a night that lasts forever], admitting "nada sea para siempre" [nothing is forever] and "nadie sabe qué vendrá" [nobody knows what will come]. The vertigo is that dizzy, reckless feeling "que no se va" [that won't go away]. Pairing it with a lonely moon who wants a child she can't have is a clever, slightly eerie match.