Sergio y Estíbaliz
Sergio and Estíbaliz were a Spanish vocal duo, formed by Sergio Blanco Rivas (17 November 1948 – 15 February 2015) and Estíbaliz Uranga Amézaga (born 9 December 1952) who also worked with groups Mocedades and El Consorcio. They were also known for their participation in the Eurovision Song Contest 1975. Both were born in Bilbao.
Having met in 1968, the couple joined vocal group Mocedades, with who…