Maxima first wore the eye catching hat that's making headlines for the christening of her second daughter, Alexia
The silver hat is a real stunner but Queen Maxima's not the only royal lady to make everyone sit up and look with a truly unexpected piece of headwear. Queen Letizia might not wear that many hats but when she arrived in the Netherlands for the proclamation of Willem-Alexander as king she had fashion watchers divided as to whether her headwear was fashion forward or just, well, a bit OTT.
Crown Princess Victoria of Sweden is no stranger to a large hat but her choice at the same event, the beginning of a new reign in the Netherlands, also turned heads as it took big royal headwear into a totally different sphere.
Queen Mathilde of the Belgians has made the pillbox style her own in recent times but her choice of headwear for the wedding of Prince Amadeo in Rome this summer really caught people's attention - and not necessarily for the right reasons.
Crown Princess Mary of Denmark is another royal lady who usually hits the target on the hat front but commentators at the wedding of Guillaume and Stephanie of Luxembourg in 2012 were left wondering whether the queen in waiting would be able to see the nuptials from under her headwear.
Another future queen struggling to see from underneath her brim was Mette-Marit of Norway who turned up to her country's national day celebrations in 2006 in a huge burgundy hat that obscured her view and just about everyone else's.
But of course the most famous, most eye catching, most talked about royal hat of all in the last few years is the one that almost stole the show from the bride at William and Kate's wedding. The fourth youngest first cousin of the groom usually doesn't get a starring role at family marriages but when you're Princess Beatrice and donning a hat that is dubbed 'the Pretzel' things are slightly different. It gets more amazing with every view - and did make a lot of money for charity when the princess auctioned it off.
Queen Maxima has a long way to go to beat that one.