Mary isn't even famous on the world stage.
In fairness, most European royals aren't. At the time I first got interested in royals, around late 2006-early 2007, I didn't know there were any other European royal families besides the Brits. I literally found out from reading the royalty profiles on Hello Magazine's website
Of course, since then we've had Victoria's wedding and especially Will and Kate's wedding and interest in royalty has increased as a result. Heck, MM isn't really known here in the U.S. and she's the most internationally focused of all the European crown princesses.
That said, the Danish and Australian media's insistence on portraying Mary as an international icon of glamour, charity and compassion is laughable. She has an amazing wardrobe but not a particularly fashion-forward one and that's pretty much the only thing extraordinary about her as Crown Princess.