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LONDON, ENGLAND - OCTOBER 11: Sir Rod Stewart with his wife, Penny Lancaster and children Alastair and Aiden after he received his knighthood in recognition of his services to music and charity at Buckingham Palace on October 11, 2016 in London, England. (Photo by Gareth Fulller - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 11:  Sir Rod Stewart  with his wife, Penny Lancaster and children Alastair and Aiden after he received his knighthood in recognition of his services to music and charity at Buckingham Palace on October 11, 2016 in London, England. (Photo by Gareth Fulller - WPA Pool/Getty Images)