Vadiz, born on the February 14, 1959, was the daughter of Puerto Rican actress and show host Meche Marchand, who wanted to enroll her in the Escuela Libre de Msica to begin her art studies, and of Puerto Rican trio singer Jose Luis Vadiz Colon.
When Meche married the comedy actor and television host Luis Antonio Cosme. Cosme, seeing Yolanda's talent for singing, wanted to enroll her in the Escuela Libre de Musica to begin her art studies. 
