While still in the music conservatory, Vádiz was a finalist at the Metropolitan Opera House Eastern Region Auditions, and did concerts with the Puerto Rico Symphony Orchestra along with bass Justino Diaz, and singers Ruth Fernandez, Chucho Avellanet and Nydia Caro.
Cosme, seeing Yolanda's talent for singing, wanted to enroll her in the Escuela Libre de Música to begin her art studies.
Upon their return to Italy, after promoting their new album in Puerto Rico, the couple suffered carbon monoxide poisoning caused by a defective gas heater in the apartment they were just moving into.
Upon hearing the news, Cosme, helped by his television audience, rented a hospital plane so that Yolanda, still in a coma, could be transferred to her homeland, attended by doctors and nurses at her side.
Yolanda's arrival at midnight was an event seen by many passers-by stopped on the streets and sidewalks of Isla Verde, and many others from their balconies as ambulances and their sirens passed by.