I agree with most posters above re. Maxima looking her age.
I for one think she looks exactly her age. In most pictures, that is. Some pictures of her show a distinct resemblance with Beatrix--hence, perhaps the comments on Maxima looking older than she is.
The other thing is that she seems to NOT resort to 'outside help' as in, plastic surgery and the like. Queen Rania, as many know, looks incredible but then one could argue she's in effect bought some of her stunning looks.
Not so Maxima. She might show the results of some of the damage that living life has done to her skin--what with chasing the sun in 10-plus vacations annually early on in her marriage, to being known for smoking like a chimney-- but at least she is not afraid to just be herself, at whatever age. Thank goodness for that. The Dutch are lucky to get a queen who acts and looks her own age.