Sarah Harding (b. November 17, 1981) is a singer in the all-girl group Girls Aloud from Stockport, England. Before joining Girls Aloud she did some vocals for Project G on some unreleased tracks.

Whilst working as a waitress and barmaid in Manchester, she entered the UK talent-search show Popstars: The Rivals, and was picked as the final member of the five-piece group, Girls Aloud, that formed the female half of the eponymous 'rivals'.