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Kate Middleton Dress With Slit at Thirty Club (Video)

Video: Kate Middleton Surprises With a Sexy High Slit!

Kate Middleton is showing some leg! The Duchess stepped out at a black-tie gala for the Thirty Club at Claridge's hotel in London yesterday where William was delivering a speech, but it was Kate who stole the spotlight with her sexy gown. We have your look at footage from the event, and details on the new rumor about Pippa Middleton moving to NYC in today's PopSugar Rush!

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