María José Castillo (born August 11, 1990) is a Costa Rican singer. She is best known for her participation in Latin American Idol. On the show she ended as the runner-up, losing to Margarita Henríquez. Her debut album, "María José", was released on November 25, 2008. The album was successful, debuting on the Costa Rican Top 10 albums on position 5. Its lead single, "Abre Tu Corazón", entered the Costa Rican Top 40 at position 3.