Twelve acts participated in the Spanish national final Eurovisión 2005: Elige nuestra canción, broadcast from the Buñuel Studios in Madrid by TVE and hosted by Carlos Lozano, Patricia Pérez and Ainhoa Arbizu. The competition consisted of one semi-final, held on 4 March 2005, and a final held a day later on 5 March 2005. The list of participants included the controversial trio Las Supremas de Móstoles, who ranked second.
Spain automatically qualified for the grand final, on 21 May 2005; as part of the "Big Four". During the placement draw, it was determined that Spain would perform 10th. On 21 May, Spain placed 21st with 28 points.