According to E! News, Rachel's birth mother used cocaine while she was pregnant with her. After she was born, Rachel lived in a crack house before being placed in foster care. The New York Post first reported the story.
"She was born a crack baby and actually lived in a crack house and suffered a lot of abuse," Rachel's adoptive mother, Barbara Crow, told the Post. "But she is totally unaffected by it. She never looks at [her past] in a sad way. She looks at it as that is what made her the person she is."
Rachel said she thinks of the couple who adopted her as her real parents. Her birth parents had their parental rights terminated when Rachel was taken by Social Services. Rachel came to the Crows when she was six months old and was formally adopted a year later.
'The X Factor' hasn't featured this aspect of her past, but Rachel said she's speaking out now to help others. If she wins the show's $5 million prize, Crow told the Post she would put it towards helping foster kids.
"I want to build a foundation that makes them feel good about themselves -- whether they want to sing or act or whether they want be in sports or go to Harvard," she said. "I want to make sure they get to chase their dreams."