The super-short frock had a ripped hem that at first glance looked like Mrs Kutcher had torn off the bottom, but hers was in fact true to the dress shown on the autumn/winter catwalk by Balmain designer Christophe Decarnin.
The 47-year-old actress was accompanied her husband Ashton Kutcher, who looked suave in Calvin Klein Collection. With all the rumours about the couple's troubled marriage, perhaps Demi was trying to distract onlookers by showing off those fab pins?
What do you think about Demi's look? Leave a comment below and let us know!
In related news, see Demi swap sexy for nerdy chic.