Hosk donned a smocked white tube top that flared into a fluttery peplum ruffle at the waist. She wore matching harem pants ...

The shirt: Cos Slim Lightweight Long Sleeve Top ($49) The details: Sizes XS-L / 94% cotton, 6% elastane / Also available in black, gray, olive green, and more.

Made from a soft and breathable material and featuring a mock neck, this tie-dye mesh top is a fun, modern take on the Y2K going-out top. It's currently on sale for a shocking $10 (yes, really). $9.99 ...