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A Guide To Kate Middleton's Least Princess-y Facial Expressions

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Kate, Duchess of Cambridge, watches as Mark Cavendish falls from his bike near the finish line of Stage 1 of the Tour De France Saturday, July 5, 2014 in Harrogate, England. The world's greatest cycle race, the Tour de France started for the first time in its history in Yorkshire this weekend. The event is expected to bring thousands of cycling fans to the region. (AP Photo/Chris Jackson, Pool) | ASSOCIATED PRESS

Kate Middleton usually looks elegant and composed when she's performing her royal duties, but, like every human, she does occasionally drop her picture-perfect grin to reveal deeper emotions.

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