TROUBLED: Alison Carey

Mariah Carey’s sister has been nabbed on charges of prostitution.

The star’s 55-year-old sibling, Alison Carey, was arrested in New York, by an undercover cop who posed as a man paying for sex, according to the Daily Freeman.

She was caught after allegedly advertising her services online and used lyrics from Mariah’s hits to lure customers.

One ad read: “Im a pretty lady looking for guys who are looking to have some fun and get into a world of pleasure that other woman just cant provide two you.” It included lyrics from Mariah’s 1995 hit Fantasy.

Mariah hasn’t had contact with Alison for “years”.