Los Leales is an Argentine cumbia santafesina band formed in 1985 in Bernal Oeste (Quilmes, Buenos Aires Province) by vocalist Marcelo Agüero, guitarist Miguel Ángel Aragón, bassist René Cejas, and timbalero Jorge Carou, a lineup that helped translate the guitar-driven Santa Fe sound into the Buenos Aires bailanta circuit through constant live work and early recordings. The group formalized its catalog with albums such as Cumbia Santafesina (1987) and then sustained a steady release pace across the 1990s, eventually landing one of its most enduring romantic staples with “Vuelve Mi Amor” (1999), a track that remained central to their set and later re-circulated widely through compilations and live versions. In the 2000s, Los Leales kept their legacy visible with retrospective packages like Exitos de oro (2002), and by the 2010s they were framing their longevity explicitly through anniversary-era material including 25 Años (2011) while continuing to update their guitar-forward style on projects like the EP Duelo de Guitarras (2017). In the 2020s, the band maintained a modern streaming presence with new and session-based releases, including Cumbia Viva Session #3 Los Leales (2023) and the EP Mas Vivos Que Nunca (2024), followed by late-period singles such as “El Dorado” (2024) and “Barco a la Deriva” (2025). The lineup also evolved: besides band leader and founding member Miguel Ángel Aragón, the group welcomed Matías Aragón (his son) as an onstage member, Sergio “Tiki” Oroná as the vocalist, and Carlitos Albornoz on timbales.