Beatriz Teresa "Betty" Missiego Campos is a Peruvian singer and dancer. She moved to Spain in 1969 and holds dual Spanish and Peruvian citizenship since 1972. She is best known for representing Spain at the Eurovision Song Contest 1979 in Jerusalem with the song Su canción, which finished in second place. The song itself holds the record for the most "la"'s sung in any contest entry over the years.