As it turns out, celebrities who could wear any designer under the sun actually rely on one of the most classic brands in existence: Ray-Ban. While Old Céline or New Bottega Veneta sunglasses are certainly covetable, there's nothing quite as timeless as a pair of Ray-Bans. Right now, the brand is offering 30% sitewide on its website until Tuesday, April 7-and you know we love a good deal.

Overall, celebrities like Kate Middleton, Emily Ratajkowski, and Constance Wu gravitate towards three Ray-Ban styles, in particular. The Duchess of Cambridge, for one, is a fan of Ray-Ban Original Wayfarer Classic Sunglasses ($109). She's been photographed in them numerous times. (In fact, we've rarely seen her wear sunglasses that aren't by Ray-Ban.) Scroll down to see which other styles celebrities love and shop the on-sale sunglasses.

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