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.
The Manchester United soccer team swept into Cipriani Wall Street for a dinner and fashion show sponsored by Hublot.
The design duo is wishing the brand a happy 20th birthday with a one-off capsule collection that will bow during Milan Fashion Week.
Stella McCartney is out to woo her customers with a ramped-up Web site, a new edition of her iPad app and a first look at the fall ad campaign.