Jade Thirlwall's Celeb Boutique Azealia Black Sheer Mesh & Jersey Sleeveless Collared Tulip Mini Dress With Detachable Heavy Cluster Necklace, Satin Waistband & Collar & Nude Slip Layer To Top

You can view Jade in her sophisticated little black dress with necklace detail here.

You can buy Jade's dress here from the Celeb Boutique website.

For the other girls' outfits in the photos linked above please check the Little Mix label.

Item image via Celeb Boutique.