The formal dance traditionally featuring the quinceañera and her court of honor is the waltz.
A choreographed waltz is one of the best-known parts of a traditional quinceañera reception. The celebrant may dance with members of her court, family members, or both. The performance gives the event a formal, ceremonial character and is often rehearsed well in advance. In Spanish-speaking contexts, the dance may be called a vals.
Modern celebrations frequently add other dances and musical styles. A family might include cumbia, salsa, merengue, regional Mexican music, or a contemporary choreographed routine. Those additions do not eliminate the traditional waltz; they often follow it as part of a larger program.
The court of honor is not identical in every celebration. It may contain friends, relatives, or a mixture of young men and women, and its size varies. Therefore, the stable traditional association is the waltz itself, not one fixed number of dancers or a single required song.