Rachel Stevens wowed her Instagram followers on Monday wearing the most beautiful polka dot midi dress - and we’re sure the Duchess would approve of the elegant style. RELATED: Rachel Stevens wows in cut-out dress - wait 'til you see the backSHOP: 18 best flattering wrap dresses for summer: From M&S to ASOS, Zara, H&M & MOREThe singer showed off a selection of chic Oasis fashion pieces including unique prints and vibrant colours, but we particularly love the Kate Middleton-Esque high neck midi dress that’s perfect for summer occasions. The dress is currently in the sale, but you’ll need to hurry if you love it - as it’s selling fast.