The test of a great songwriter is in the depth and variety of the songs. It's enough to hear Fernando Osorio perform the 2001 tune he wrote for Celia Cruz, "La Negra Tiene Tumbao" ("The Black Woman Has Swing"), in his own acoustic, shoe-gazing style to appreciate the infinite possibilities of his lyrics and melodies. Born in Bogotá and reared in Venezuela, this Miami resident has penned tunes for acts as diverse as Venezuelan crooner Ricardo Montaner, Dominican merenguero Sergio Vargas, Puerto Rican salsero Jerry Rivera, and urban New York trio DLG. But his greatest gifts to listeners so far have been Celia's last two blockbuster hits, which Osorio co-wrote with producer Sergio George: "La Negra" and "Rie y Llora" ("Laugh and Cry"). There can be no doubt that this songwriter has swing or that his hour has arrived -- deep and diverse.