Formed in 2004, regional Mexican outfit Enigma Norteño is best known for their controversial narcocorridos, which tell stories (real and imagined) inspired by the international drug trade. ∙ Stateside success came with the 2009 album Corridos de Altura and the hit single “El Ondeado (M1),” the band’s first song to hit the Billboard charts. ∙ Juego Prohibido, from 2010, included one of their biggest hits and signature songs, the tender love ballad “Aunque Sea en Silencio (Cuatro Paredes).” ∙ With radio often refusing to play their narcocorridos, Enigma Norteño has increasingly turned to the internet, where their videos have garnered hundreds of millions of views. ∙ Many of the band’s hits are romantic in nature, including their biggest chart success, the 2014 accordeon-fueled romp “Calla y Me Besas.” ∙ Unafraid of courting controversy, in 2015 they released “El Chapo Guzmán,” which was inspired by the infamous Mexican drug lord.