Santa Justa Klan was a Spanish band that emerged from the TV show Los Serrano. It was formed by several of the actors in the series: Víctor Elías, Natalia Sánchez, Adrián Rodríguez and Andrés de la Cruz. The target audience was children who had sent in letters referring to the sometimes troubling situations which occur in school between boys and girls. In the series, the leader of the group is Guille. From their first album they released two singles: "A Toda Mecha", which launched them to fame, and "Del 1 al 10".