The formal waltz performed during a quinceañera is commonly called a vals.
Vals is the Spanish word for “waltz,” a partnered dance traditionally associated with the celebrant and her court. The dance often appears during the formal portion of the reception and may be rehearsed in advance, especially when several attendants perform a coordinated routine.
The dance’s presence reflects the event’s older presentation and social-dance traditions. Historically, formal dancing helped present the celebrant to family and community. Today, the choreography may remain a traditional waltz, shift into a modern routine, or combine several musical styles.
A vals is not necessarily the only dance at a quinceañera. Receptions commonly include later dances for guests, and some families replace the traditional waltz with a contemporary performance. The term identifies the formal dance tradition, not a required song or one fixed choreography.