Sometimes she shakes things up between repeats...
Trooping the Colour, 1980
35 years later: Ascot 2015...and sometimes you wish she wouldn't, because a hat change like this is not necessarily for the better. (Not to worry, she still has the original hat - she wore the ensemble to Ascot in 2011).
It's kind of remarkable that she's sometimes better off sticking with the original, actually. She has her own brand of stylishness in a certain way.
29 years later: Christmas 2012I would argue that Russian Winter Princess is a look for the ages, for example.
Wedding of the Prince of Wales and Lady Diana Spencer, 1981
27 years later: Wedding of Lady Rose Windsor and George Gilman, 2008...some things are best left to fester in the decade whence they came.
There's a sneakiness to this sartorial strategy, though, because even when she pulls a real clunker out of storage, she still comes out ahead. I mean, we're still talking about the fact that she can fit in decades-old clothes, aren't we? Anne always wins.
Photos: via Getty Images