As a fashion icon, the two-year-old is a little young for the catwalk.
However, Princess Charlotte has overtaken her mother and any other royal in terms of inspiring copycats.
Searches for Princess Charlotte on eBay increased 10-fold on her second birthday on May 2, which saw the publication of official photos of her wearing a yellow cardigan.
Similarly, a Liberty print smock dress worn by the young princess on the royal tour of Germany in July saw a six-fold increase in people searching "Princess Charlotte Dress".
An eBay spokesman said the little princess has the biggest "spend power" of the royals this year.
The royal family are hugely popular with British buyers with the queen regularly attracting the attention of shoppers.
But it's the youngest generation of royals who really generate the must-have fashion items - and driving a new generation of shopping behavior on eBay.
The princess's wardrobe is chosen by mother, Kate, who remains hugely important in boosting the sales of British fashion labels, particularly in America, according to eBay.
And every time, the Duchess of Cambridge makes a major public appearance there is an effect on shopping behaviour in both countries.