Fans of Selena Quintanilla-Pérez, the Mexican-American singer who was murdered in 1995 at age 23, have never stopped celebrating her life and music. On April 8, Emily Berl, 32, an artist and photographer, attended the Selena Fan Gathering at Plaza de la Raza in Lincoln Park, near her home in Los Angeles, to see how that Tejano music sensation was being remembered.

Ms. Berl has a fascination with fan culture and the groups that can build around it. “That kind of dedication is really interesting to me,” she said. “People working one way or another toward a common idea.”

She shared some of her portraits from the day.