This girl is on fire! Alicia Keys looked smouldering and sexy in her black low-cut dress at the 40 Principales Awards ceremony, in Madrid last week. The international superstar wore this season's sexiest trend with her black sheer dress and retro hair up-do. The body-con style dress featured a midi-length pencil skirt, and teamed with the sheer cut-out top created an hourglass look for her pear-shaped frame. The R'n'B singer accessorised this chic outfit with strapply black heels, diamond earrings and a simple diamond ring. To create this vintage look with a modern twist, Team LBD recommend this Beatrix Brown dress, £249, in black with sheer top and sexy sweetheart neckline — perfect for Valentine's Day! These black and grey Kat Maconie heels will match perfectly, and will put a modern twist on this simple sexy outfit. Finish this hot look off with a Buba Rockafella clutch bag, gorgeous Brandts drop earrings and a dazzling crystal cocktail ring. Beatrix Brown Belle dress in Black, £249, Kat Maconie Mildred Shoe, £215, Buba Rockafella Clutch Bag, £406, Rok Chix Crystal Ring, £80, Brandts Rose & Crystal Drop Earrings, £45. Shop all sexy sheer dresses here!