Inventories are being kept tight in hope of increasing full-price selling and reducing markdowns.
The music star had launched the collection last February during New York Fashion Week.
The brand has launched an e-commerce site with plans to open its first store in Los Angeles in April, followed by a shop in New York in the summer.
The singer and underwear model was joined by Korean pop star Jay Park as well as fellow Calvin Klein face Kendall Jenner.
The collaboration with Swedish firm Teenage Engineering is the H&M-owned brand’s first outside ready-to-wear.