[1] The song was composed by Juan Carlos Calderón for Paloma San Basilio's album La fiesta terminó.
Calderon was internationally best known for writing Mocedades' 1973 entry "Eres tú", a song that finished second in the contest and went on to become a worldwide hit.
[4] On 1 April 1985, TVE released a promo video with San Basilio singing the song in a studio that was distributed to the other participant broadcasters.
On 4 May 1985, the Eurovision Song Contest was held at Scandinavium in Gothenburg hosted by Sveriges Television (SVT), and broadcast live throughout the continent.
Paloma San Basilio performed "La fiesta terminó" fifth on the night, following Denmark's "Sku' du spørg' fra no'en?"