One of the best Mercedes Sosa compilations on the market, 30 Años (1993) is loaded with 20 of her greatest hits and goes back three decades to the early days of her recording career. Highlights include “Gracias a la Vida,” “La Maza,” and “Maria, Maria,” to just mention a few of her signature songs. Given its early-’90s release date, 30 Años misses a bunch of her latter-day material but makes up for it with an emphasis on certifiable classics. – Jason Birchmeier