Queen Letizia, Gisele Bundchen and Shakira's eyebrows are raised as if they were about to fly at any time. Dermatologist Juanma Revelles: 'foxy eyes' are fashionable, precisely, because they raise the tail of the eyebrow to the maximum.

In excess, they give an unwanted feline or malefic appearance. Botulinum toxin can raise the eyebrows, but they must be applied in their right measure to open the look, says Dr. Verónica López Couso, from the International Dermatological Clinic.