Posted December 17, 200717 yr Girls Aloud star Sarah Harding has been targeted by a phone prankster who pretends to be Amy Winehouse. The singer revealed that she had to ask for help from her bandmate Nadine Coyle to stop the calls. "I had some strange calls recently from someone saying they were Amy Winehouse," Harding told Cosmopolitan magazine, "but it was a man's voice with a northern accent!" Coyle added: "We've all got special passwords on our phones now that stop us getting crank calls." Digitalspy.co.uk