The popstars took part in a fashion face-off as they stepped out in the same cut-out playsuit, just one day apart.
The playsuit in question features high-waisted shorts attached to a cute bralet, and costs £50 from Lashes of London.
Ellie pipped Perrie to the post as she sported her all-in-one on 9 June, pairing it with simple black trainers whilst preparing to perform at the Capital FM Summertime Ball.
And the very next day, Perrie gave us a case of déjà vu when she was snapped rocking the pale blue version.
The 'How You Doin'?' singer added a black bandeau and comfy white plimsolls during a meet-and-greet with her fellow Little Mix-ers in America.
We reckon this stand-off is too close to call, but who do you think looked best? Let us know by voting below!