Selena died 20 years ago today. Here's why we're still talking about her mark on American culture.

For at least one day every year, Selena-ness is next to godliness.That's because March 31 marks the anniversary of the death of Selena Quintanilla-Pérez, the Latin pop star and Queen of Tejano, who was murdered by the president of her fan club, Yolanda Saldivar, 20 years ago.