Holly Willoughby has channelled Princess Diana as she recreated her iconic 'black sheep' jumper look.The Princess of Wales wore the famous red, white and black item of clothing, designed by Warm and Wonderful, in June 1981 during a polo match she attended with her husband Prince Charles.The sweet wool number features a white collar with a black tie around the neck while the main body is covered in a white sheep pattern, with a single black sheep to stand out against the rest.