Gaudelia Díaz Romero (born in 1964) is a Mexican former paralympic athlete who competed mainly in category B1 distance events. She is also a singer, pianist and actress who has performed under the pseudonym Crystal since the 1980s. In the 1990s, Díaz was part of the Mexican team that traveled to Barcelona, Spain for the 1992 Summer Paralympics. There she competed in the 800 meters (ended fourth), 1500m (ended fourth) and 3000m, the last one earned her a bronze medal.