Formerly known as Harlow, L.A.-based Monrow from Megan George and Michelle Wenke does casual chic tees that are far from basic. The fabric is ultralight, but not sheer, and the Rococo-inspired prints add a rocker edge that turns the tees and tanks into something supersexy and right at home under a cool leather jacket or vintage cardigan. Monrow's breezy grunge lives on the corner of effortless and cool, which is the attitude sweet spot for celebrity stylists. Rachel Bilson, Sienna Miller and Kate Moss have jumped all over Monrow, and so have we!

Our must-have: the Marilyn T-shirt.