Mexico Teenagers

Cecilia, center, 15 year old girl plays with her dresse before a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

Fifteen year old girls pose for a group picture at the Franz Mayer museum before a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A 15 year old girl shouts from the inside a bus during a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A 15 year old girl ties her sneakers as she gets ready for a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

Fifteen year old girls wave from a bus on their way to a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

Fifteen year old girls take pictures of themselves during a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A girl wears a mask during a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A girl waits before a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A 15 year old girl waits for the start of a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A 15 year old girl gets her make up done before a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A fifteen year old girl walks down the stairs before the start of a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)

A fifteen year old girl is reflected in a bus' side mirror as she rides with other girls to a mass Quinceanera birthday celebration in Mexico City, Saturday, April 28, 2012. The Quinceanera marks the transition from childhood to adulthood and is common in Mexico and other Spanish speaking countries. (AP Photo/Dieu Nalio Chery)