In 1974 , she won the equally prestigious third edition of the Festival OTI representing her country in Acapulco , Mexico , with the song " Hoy canto por cantar " . The song , composed by Caro and Riccardo Cerratto , caused some controversy in Puerto Rico for being the " anti-protest " song in that decade . Despite that , the song helped Caro further extend her popularity built on prior hit songs such as " Cuéntale " , " Duerme " , " Charly " , " Copos de nieve " and " No Pudo Ser "
third edition
OTI Festival 1974
Nydia Caro