Quinceañera (lit. meaning One (f.) who is fifteen), sometimes called Fiesta de Quinceañera, or simply quince, is the celebration of a girl's fifteenth birthday in parts of Latin America and elsewhere in communities of immigrants from Latin America. This birthday is celebrated differently from any other birthday, as it marks the transition from childhood to young womanhood.
In Mexico, the birthday girl is fixed up with fancy makeup. Traditionally, this was the first time she would wear makeup, but more recently this is no longer the case. She also has her nails and hair done especially for this occasion and dresses up with a fancy dress that she had chosen in advance.
In the Mexican tradition - and if the teenager is Catholic - the quinceañera festival begins with a Thanksgiving mass. For this mass, the teenager wears a formal dress, usually quite creative in fashion and reminiscent of what a western bride or princess would wear. Traditionally, the quinceañera would wear a pink dress to symbolize her purity; however, in recent decades, white has become the color of choice to symbolize this treasured quality.
She arrives at the celebration accompanied by her parents, godparents, damas, and chamberlains. She is also awarded a tiara as a reminder that to her loved ones, especially her immediate family, she will always be a princess. [Wiki]