Pippa Middleton (PA Photos)

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Whose wedding? Lady Katie Percy and Patrick Valentine (nope, us neither), 2011.
Who's the guest? Kate's sister Pippa Middleton.
What's she wearing? A red frock, black ruffled coat and fancy veiled hat. With no sign of Kate and Wills, the waiting photographers had to make-do with Pippa - but, as you can see, she didn't disappoint. Nice work, Ms M!