Princess Letizia of Spain Celebrates Her 40th Birthday [Getty Images]

MADRID, SPAIN - SEPTEMBER 15: In this handout photo provided by the Royal Press Department, Princess Letizia of Spain and Prince Felipe of Spain pose at Zarzuela Palace on September 15, 2012 in Madrid, Spain. Princess Letizia of Spain celebrates her 40th birthday today. (Photo by Cristina García Rodero/Royal Press Department via Getty Images)

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