The black-and-pink hat appears to be a repeat from 2011.
Queen Elizabeth Wore a Hot-Pink Coat and Coordinating Hat at Her Latest Appearance
The Royals' Top Ten Buckingham Palace Garden Party Fashion Moments
The Queen is chic in hot pink as she goes for racing glory
Kate Middleton's Style Through the Years
The original Regal Recycler: Queen Elizabeth II made a habit of re-using favourite outfits long before the younger royals caught on
The Queen as style icon: colours solid and bright as a Cluedo piece, Queen Elizabeth II
The Queen as style icon: colours solid and bright as a Cluedo piece, Queen Elizabeth II
Queen Elizabeth Owns 100 Umbrellas to Color Coordinate Her Looks
Why Queen Elizabeth always wore bright colors
Elizabeth Pink's Instagram, Twitter & Facebook on IDCrawl
A look at Queen Elizabeth II's style through the decades
The Queen Wore a Pink Coat. The World Went Wild.
Queen Elizabeth's Best Outfits: Her Most Iconic Looks of All Time