"Eres tú" is a song recorded by Spanish band Mocedades, written by Juan Carlos Calderón. It represented Spain in the Eurovision Song Contest 1973 held in Luxembourg placing second which was followed by a global success.

Spain has participated in the Eurovision Song Contest in every edition since 1961, in total 63 times. Since 1999, Spain has been one of the "Big Five" countries, along with France, Germany, Italy and the United Kingdom, that are automatically prequalified for the final each year as they are the biggest financial contributors to the European Broadcasting Union (EBU).