Jesy Nelson vamps up in a racy black bodysuit .........

with a sheer cover up at a Little Mix book signing in London... as the group's new single Shout Out To My Ex reaches number one

Their latest single Shout Out To My Ex has given them their fourth UK number one.

And Little Mix were able to enjoy the achievement with fans on Saturday, when they signed copies of their new book Our World in London.

The girls dressed to impress at the event, with Jesy Nelson vamping up in a gothic-inspired ensemble, while Leigh-Anne Pinnock went for a sporty look.

Jesy wore a black bodysuit with a leather waistcoat and a sheer cover-up. She rocked a chunky pair of black leather boots embellished with metallic studs and accessorised with a choker.

Leigh-Anne sported a bold red crop top which exposed her taut tum. She accompanied the piece with a pair of black flaired Adidas jogging bottoms and styled her hair in two chunky bunches.

Perrie Edwards went for a a stylish pale grey co-ord set, matching an ankle-length high-waisted skirt with a bardot crop top.

Her dark eye make-up contrasted with her golden locks, and she finished her outfit with silver heels.

Jade Thirlwall wore a lilac V-neck jumper with a metallic miniskirt and black, thigh-high boots.

Unsurprisingly, the girls were in a great mood as they posed for pictures with copies of their book, each of them smiling brightly.  

Shout Out To My Ex made its way straight to the top of the Official UK Singles Chart on Friday ousting James Arthur's Say You Won't Let Go from the top spot.

Thrilled with the news, the girls took to Instagram to say a big thank you to their fans.