Rebeca Malavassi entered the children's choir of the School of Musical Arts of the University of Costa Rica in 1990, where she also attended piano and violin lessons. Between 1992 and 2017 she was part of the Angelus Choir and in 1996 she represented Costa Rica at the UNESCO Peace Games in Togo, Africa, where she won third place. 
 She has worked since she was a child recording jingles and productions for national and international artists. She has also worked as a background vocal artist for international stars such as Armando Manzanero, Ismael Serrano, Jean-Michael Byron, Braulio, and national artists such as Charlene Stewart, Tamela Hedström, Arnoldo Castillo and Marta Fonseca. 
 As a soloist she has performed on national stages such as Teatro Nacional, Melico Salazar, Jazz Café and Eugene O'Neill and on international stages such as the Santa Tecla Festival in El Salvador and Chic Delirium in Spain. She recently graduated in Music Creation and Production in Madrid, Spain.