“Eres tú” (“It’s You”) was the Spanish entry to the 1973 Eurovision Song Contest. It was written and conducted by Juan Carlos Calderón and performed by the band Mocedades (Youths). Calderón conducted and Mocedades performed live at the contest on April 7, 1973. They came in second to the Luxembourg entry “Tu te reconnaîtras” by Anne-Marie David.

The song was released as a single shortly after the contest and achieved chart success across Europe, far outstripping the winner. But the extremely rare thing was that by 1974, the original Spanish language version of the song was a top 10 hit in the United States, hitting #9 in the Billboard Hot 100. Mocedades is one of only five acts from Spain to score a top 10 hit in the U.S. and the only one to do so with a song entirely in Spanish.

An English language version of the song was created called “Touch the Wind”. The English lyrics, credited to Mike Hawker (best known as co-writer of “I Only Want to Be With You”), were entirely new and not an attempt to translate the original. Despite its mild success on the U.S. charts at the time (especially in covers), it has mostly faded into obscurity.

There was a fairly large scandal concerning the song at the time of the contest, with accusations that “Eres tú” was a plagarized rewrite of the 1966 Yugoslav entry to the Eurovision Song Contest, “Brez Besed” (“Without Words”) sung by Berta Ambrož. Despite the claims, “Eres tú” went unsanctioned. There is a possibility that the decision to not act was made for political reasons at the time, seeing Franco’s Spain as more European mainstream than Tito’s Yugoslavia. Listening to the original though, while there is a similarity in the openings of both, past the first few seconds, there seems to be sufficient divergence to dispute the plagarism claims.