Mary-Kate Olsen Ashley Olsen twins sisters dress fringe tassles fashion

It was practically impossible to tell Mary-Kate and Ashley Olsen apart in Paris on Saturday night!

The two looked more identical than ever now that both are back to blonde, and their long, black get-ups were super similar!

The sisters are in Paris for Fashion Week. We snapped them as they headed from their hotel to Kanye West's show.

But Mary-Kate and Ashley aren't just attending -- the successful young designers debuted the new handbag collection for their The Row label with a cocktail soiree at the Montaigne Market in Paris.

The collection has already sold out of its alligator backpack -- which retails at an eye-popping $39,000 (see the black bag in our picture above.)

Designer Christian Louboutin attended the party, where he told reporters he feels like a "godfather" to the twins.