In a poll conducted by Start-Rite shoes, Harper bagged the top spot. The company had surveyed mothers to vote for the most stylish celebrity kid, reported E!Online.
Harper's 15-year old brother, Brooklyn was on the second spot, while their 11-year-old brother Romeo came third.
Her third brother Cruz landed on sixth place.
Last year Harper had sat on the front row at her mother's show at the New York Fashion Week.