La pregunta de hoy está sobre español

Friday's One Cup of Java Challenge: The first song completely in Spanish to hit the #1 spot on the U.S. pop charts was at the top spot twenty years ago today. Your One Cup question on this Friday morning: name that song, which topped the US charts for three weeks in 1987.

Answer: La Bamba by Los Lobos, from the film of the same name. Ritchie Valen's version had topped out at #22 on the charts.