Another interesting return is Bolivia . The andean country 's last participation was in the edition of 1975 in San Juan , Puerto Rico , with the not very fortunate entry by Óscar Roca . Since then , the country withdrew mainly because of the disappointing places and to diplomatic problems with the neighbouring countries such as Chile . With the return of the Bolivian broadcaster to the festival , Susana Joffré was the singer who defended the Bolivian colors in the contest
edition of 1975
OTI Festival 1975
OTI Festival 1980