Girls dressed in evening gowns pose for photograph at Zocalo square in Mexico City April 28, 2012. Three hundred forty-eight girls dressed up for their 15th (Quinceanera) birthday celebration had their great day on Saturday, a tradition dating back to the Spanish colonial era when 15- and 16-year-old girls had their official debut in society. [Photo/Agencies]

Girls dressed in evening gowns smile at Zocalo square in Mexico City April 28, 2012. [Photo/Agencies]

Girls dressed in evening gowns pose for photograph at Zocalo square in Mexico City April 28, 2012. [Photo/Agencies]