05/17/2010 01:41 pm ET | Updated May 25, 2011

Princess Letizia vs. Mexico's Margarita Zavala: Fashion Face-Off In Madrid! (PHOTOS, POLL)

Just two days away from a White House state dinner hosted in their honor, Mexico's First Lady Margarita Zavala and President Felipe Calderon swung through Spain, where they attended 'I Foro Espana Mexico' at the Cervantes Institute with Prince Felipe and Princess Letizia. Both leading ladies showcased their sartorial skills, but who was best-dressed? Vote below!