Fantasy Advent Calendar: December 21 Behind door number twenty-one is a self-indulgent slip... Stella McCartney is the undisputed queen of sophisticated lingerie, offering vintage accents and figure-enhancing designs. This backless chemise is an elegant sleepover option, especially when in a festive emerald hue. Clara Whispering Chemise, £160, Stella McCartney at Harrods. Click here to access more of our festive content