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404675 04: Dutch Crown Prince Willem Alexander (R) and his uncle Pieter van Vollenhoven attend the celebrations for Dutch Queen Beatrix "Queen's Day" April 30, 2002 in Meppel, The Netherlands. Traditionally, Queen Beatrix celebrates her birthday on this day, which is actually the birthday of her mother Princess Juliana. (Photo by Michel Porro/Getty Images)

404675 04: Dutch Crown Prince Willem Alexander (R) and his uncle Pieter van Vollenhoven attend the celebrations for Dutch Queen Beatrix "Queen's Day" April 30, 2002 in Meppel, The Netherlands. Traditionally, Queen Beatrix celebrates her birthday on this day, which is actually the birthday of her mother Princess Juliana. (Photo by Michel Porro/Getty Images)