‘X Factor’ kid started out in a crack den

The 13-year-old “X Factor” singing sensation, Rachel Crow, is on the verge of stardom right now — but was born into a life filled with drugs and violence.

“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, says.

“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.”

Barbara, a former hospital counselor, and husband, Kelly — who owns an excavating business in Boulder, Colo. — took in 6-month-old Rachel as a foster child and formally adopted her a year later.

They do not know the identity of her birth parents.

“She came to us through Social Services,” Crow says. “In situations like that, it is a little more dangerous, so they keep everything sealed.

“It is not like entering into a typical private adoption. This is where parental rights were terminated, and the child suffered a lot of abuse,” says Barbara. “I would just like 10 minutes with them.”

Rachel — one of 11 finalists remaining in the Fox singing contest — says she has no interest in meeting her birth parents.

“I have two amazing parents already,” she told The Post yesterday.

“It is crazy because everybody is like, ‘She is not your real mom.’ And I am like, ‘Yeah, she is!’ ”

For some reason, the producers of “X Factor” — who are not shy about playing up the unhappy background stories of contestants — have chosen not to reveal Rachel’s wretched back story so far.

The vivacious, home-schooled eighth grader became an instant fan favorite from the show’s first episode,

If she wins the $5 million first prize, Rachel says she wants to help other 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 says. “I want to make sure they get to chase their dreams.”