Bria Murphy is truly her mother Nicole's daughter: The 21-year-old (whose father is Eddie Murphy) just landed a spokesperson gig for Dark & Lovely hair care. "I wanted to model as soon as I saw her on the runway," Bria tells PEOPLE. Mom's advice? "You have to be really strong to deal with the rejection." But family business aside, "We're always bonding. We always have fun with each other," says Bria.