From 1977 to 1999 , TVE used an internal selection process to select both the singer and the song to represent them at Eurovision . For 1979 , Betty Missiego , a 34-year-old singer and television presenter from Peru who had previous song contest experience representing Peru at the OTI Festival 1972 in Madrid , was selected to go to Jerusalem with the song " Su canción " , written and composed by Fernando Moreno
OTI Festival 1972
OTI Festival 1972
Su canción