Their parents, Salvador, a railroad worker, and mother, Concepción eventually moved the family of ten to San Jose, California.
The four sisters arrived in Mexico City in 1948 and performed as a quartet and enjoyed steady work on a weekly live radio show on station XEW and were under contract as the featured act at "El Patio", which at the time was the number one nightclub in Mexico City, Mercedes eventually returned to the United States to marry.
In 1950 the sisters were approached by the "Mambo King" Pérez Prado to go on a world tour that included Japan, Europe, and South America, and signed on as RCA Victor recording artists that same year.
The group went on to work with some of the era's biggest Latin music performers and toured with names such as Celia Cruz, Billy Eckstine, and Nat King Cole.
Through their recording career, they released many songs with many Latin band leaders such as Luis Arcaráz, Rafael de Paz, Lucho Bermúdez, and Chucho Navarro.