Her embrace of dark partywear that has garnered the Duchess the highest number of headlines, beginning with the stunning Diane von Furstenburg gown worn to meet stars - among them One Direction's Harry Styles - at the Royal Variety Performance late last month.
Second time around: The gown was on its second outing this year, having been worn to the Portrait Gala in London in February
Good look: The Duchess began her tour of New York in black Beuhlah (right) but chose Hobbs and Jenny Packham for a reception last month
With its pretty lace sleeves and sweetheart neckline, the dramatic number added a shot of demure glamour to the night - and eclipsed the more colourfully dressed A-listers who also attended.
A day later and Kate was back in black, this time for a Kensington Palace reception. This time though, the Duchess dispensed with designer in favour of High Street staple Hobbs, teaming a sheer polka dot blouse by the brand with a skirt by Jenny Packham.
And the Duchess certainly isn't alone in her love of an LDD. Both Little Dark Dresses and the classic LBD have long been a party season staple, with sales of the dresses increasing by 29 per cent as December approaches, according to department store Debenhams.
'The garment that the majority of clients have said they want is that elusive little black dress,' commented a spokesperson for the store. 'The perfect one will take you from a cocktail party to an opera, from a Michelin starred restaurant to a night club, without missing a beat. A dress that can do that is certainly worth the effort.'
Glamorous: The Duchess concealed her tiny bump in a gorgeous Diane von Furstenburg gown for the Royal Variety Performance in November
Stunning: Kate's love of black lace reappeared once more at last year's SportsAid ball when she chose a Temperley cocktail dress
Dazzling: Kate opted for Jenny Packham on her final night in New Zealand and picked black for a London charity gala earlier this year
Dramatic: The Duchess loves a black lace gown for evening and opted for this show-stopping number at the War Horse premiere in 2012
Early outing: Despite her youthful penchant for brights and whites, the Duchess did occasionally embrace black in her pre-royal days