Summer heat waves can be tricky to dress for—but according to the best dressed stars of the week, a simple, easy frock can still shine whatever the season. Just look to A-listers like Scarlet Johansson, Priyanka Chopra, and Keira Knightley, who showed us how it’s all about zeroing in on dresses with effortless and timeless silhouettes. Think: Great prints and interesting cuts, without the fuss.

Knightley, for one, wore a floral Erdem dress that had just the right amount of drama, thanks to its frayed hemline and asymmetric skirt. Ditto for Serena Williams and her butter-yellow Farm Rio sun dress, which had an oversized flower appliqué at the bust. With these statement touches, the classic designs turned heads—without veering into maximalist territory.

Preppy style also had a moment this week. At Wimbledon, Olivia Rodrigo swapped her signature punky wardrobe in favor of a red gingham Ralph Lauren shirt dress. These last few days have served as a good lesson in vacation dressing, too. Just look to Saint-Tropez, where Kylie Jenner wore a halter swimsuit-dress by Isabel Marant that was the perfect (and practical) beach vay-kay piece. Because, sure, looking chic at the beach is cute and all—but you also want to wear something that you can jump into the water in immediately.

Which were your favorite celebrity looks this week? Vote below, and check back on Friday to see who Vogue readers crowned best dressed.