Dutch Prince Willem Alexander (C-R), his [Getty Images]

Dutch Prince Willem Alexander (C-R), his wife Princess Maxima (C-L) and his brother Constantijn (L) take part in the Queen's day celebration in Thorn on April 30, 2011. AFP PHOTO / ANP / MARCEL ANTONISSE ***NETHERLANDS OUT - BELGIUM OUT*** (Photo credit should read Koen van Weel/AFP/Getty Images)

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