Dutch queen Beatrix (L), Princess Maxima (C) and prince Willem Alexander (R) arrive at the Concertgebouw in Amsterdam. Princess Maxima received on May 27, 2011 a concert by the Royal Concertgebouw Orchestra in Amsterdam as a gift for her 40th birthday. AFP PHOTO / ANP / ROYAL IMAGES / TOUSSAINT KLUITERS netherlands out - belgium out        (Photo credit should read TOUSSAINT KLUITERS/AFP/Getty Images)