She and four other girls , Sarah Harding , Nicola Roberts , Kimberley Walsh , and Nadine Coyle won the competition . They formed a group called Girls Aloud on 30 November 2002 , which has since been very successful . Cole joined Nadine Coyle , Sarah Harding , Nicola Roberts , and Kimberley Walsh to comprise the new girl group Girls Aloud , formed through the show by a public vote on 30 November 2002 .