"This is Ludacris, and I'm giving away 20 free cars. ..." The famous rapper was pulling an Oprah in his hometown of Atlanta, Georgia. In the parking lot, the crowd was dancing. But the bass of Ludacris' latest single blasting from the dealership's loudspeakers was secondary inspiration for one Atlanta grandmother. "Lord Jesus. ... He brought this car to me, baby!" she shouted, arms raised. "This is God's work!"