AMSTERDAM, NETHERLANDS - MAY 27: (L-R) Maria Zorreguieta, Jorge Zorreguieta, Martin Zorreguieta, Princess Maxima of the Netherlands and Prince Willem-Alexander of the Netherlands attend Princess Maxima of Netherland's 40th birthday celebrations at Concertgebouw on May 27, 2011 in Amsterdam, Netherlands. (Photo by Helene Wiesenhaan/WireImage)