Óscar Armando Díaz de León Huez, known as Carín León, was born on July 26, 1989, in Hermosillo, Sonora, Mexico. He began his professional music career around 2005 with the local band Los Reales and co-founded Grupo Arranke in 2010, serving as composer, bajo quinto guitarist, and lead vocalist for eight years, performing norteña, sierreña, and banda sinaloense music. In 2018, he launched a solo career, blending regional Mexican styles with influences from rock and R&B. León has released albums including Colmillo de leche, Boca chueca, vol. 1 (2024), and Palabra de to's (Seca). He has won multiple awards, such as three Latin Grammy Awards for Best Mexican Music Album and Best Regional Mexican Song, plus Grammy Awards in 2025 and 2026 for Best Regional Mexican Music Album (International). His live performances feature high-energy sets, including debuts at Austin City Limits (2024), Viña del Mar Festival (2025, earning Gaviota de Plata and Oro awards), Houston Rodeo (2025, before 70,603 attendees), and NPR Tiny Desk concerts with large ensembles.