First emerging as purveyors of scandalous narcocorridos, Mexican quartet Traviezoz de la Zierra have since traded shock for seduction, without stripping away their early grit and wit. The sierreño ensemble's latest album continues that ongoing evolution with a string of lilting and lovelorn ballads like "Por Eso Estas Con Él," though Enseñame a Olvidarte isn't all soft-focus romance. The former bad boys can still kick up a ruckus on the evidence of corridos like "Te Dije," breaking up the album's gently flowing beauty with thrilling reminders of their sharp-tongued beginnings.