On any given day, you wouldn't have to ask us twice to get decked out in Chanel [1]. But Fergie [2] wore her finest designer accessories on Halloween [3] for a very good reason — she went as Choupette Lagerfeld [4]! The star pulled a sheer skirt over a lacy bodysuit and wrapped pearls around her waist. It was clear Fergie wasn't just your average kitty, from her chic furry bolero to her well-accessorized ears.

And of course, what's Choupette the cat without Karl Lagerfeld [5]? Josh Duhamel [6] was right at Fergie's side, sporting Karl's signature outfit [7]: a slick tuxedo jacket, leather pants, brooch-adorned tie, dark sunglasses, and edgy embellished gloves. The pair couldn't have been more on point for the Casamigos party — Fergie even slipped into a pair of two-toned Chanel pumps [8]!

Read on to see their standout fashion costume from all angles. We'd be hard-pressed to find a supermodel [9] who could create a couples look [10] that's up to par!

"Karrrrrrrlllll and choupette... ooh la la... #chanel #funhalloween," Fergie [11] captioned this fierce photo of herself and Josh Duhamel [12] showing off some chic accessories.