In honor of Crystal and others killed by street and gang violence, they called the concert, "Stop the Violence, Start the Healing."
The 24-year-old preschool teacher was shot in the head as she sat in a car with three friends in Inglewood.
"We just need peace right now. We need healing. All this violence has to stop. My daughter had a future, it was taken away from her," said Wanda Crawford, Crystal's mother.
Crawford said organizers are hoping to raise money to pay for a billboard about unsolved murders like Crystal's.