The French designer was synonymous with striped sweaters and Left Bank insouciance.
The music star had launched the collection last February during New York Fashion Week.
Inventories are being kept tight in hope of increasing full-price selling and reducing markdowns.
Elle magazine and Calvin Klein Collection hosted the 20th annual event.
The site is billed as one of the first globally minded fashion portals — and one not tethered to runway trends.
The actress is giving philanthropy a makeover with the help of designer Yoana Baraschi and Anthropologie.