Britain's Queen Elizabeth II and Prince Philip, Prince Charles and the Duchess of Cornwall, left, Prince William and the Duchess of Cambridge arrive for the annual evening reception for members of the Diplomatic Corps at Buckingham Palace, London, Thursday Dec. 8, 2016. The Duchess of Cambridge wears the Cambridge Lover's Knot Tiara, a favorite tiara of the late Princess Diana. (Dominic Lipinski/PA via AP)
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