&lt;p&gt;Diana in &lt;a href="https://www.macys.com/shop/product/tommy-hilfiger-polka-dot-belted-a-line-dress" target="_blank" data-tracking-id="recirc-text-link"&gt;blue and white polka dots&lt;/a&gt; at Victoria Station in London in 1989; Kate in a blue &lt;a href="http://www.neimanmarcus.com/Altuzarra/Designers/cat41270741/c.cat" target="_blank" data-tracking-id="recirc-text-link"&gt;Altuzarra&lt;/a&gt; Aimee polka dot dress at Stewards Academy with Heads Together in Harlow, England in 2016.&lt;/p&gt;