Its officially summer, which means its time for the summer dressan effortless seasonal hero piecetoshine.

Stars like Alexa Chung proved a clean, simple dress can still have a major impact.

The week saw bolder displays of fashion, too.

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Photo: Getty Images

(When in doubt, dial up the whimsy!)

Which were your favorite celebrity looks this week?

Vote below, and check back on Friday to see whoVoguereaders crowned best dressed.

Image may contain Lupita Nyong’o Adult Person Fashion Clothing Footwear Shoe Formal Wear High Heel and Long Sleeve

Image may contain Alexa Chung Clothing Dress Evening Dress Formal Wear Adult Person Fashion Gown and Accessories

Image may contain Keira Knightley Person Adult Clothing Footwear High Heel Shoe Accessories Bag and Handbag

HOLLYWOOD CALIFORNIA  JUNE 24 Mia Goth attends the World Premiere Of A24’s MAXXXINE at TCL Chinese Theatre on June 24…

Image may contain Kylie Jenner Clothing Dress Person Adult Formal Wear Fashion Gown and Evening Dress