You can view Perrie in her cool slogan tank, printed high waisted mini skirt & stacked flatform trainers here.
You can buy Perrie's tank here, from the US based Forever 21 website, as although it is available in stores here in the UK it isn't online yet, her skirt here from the Lazy Oaf website and her flatforms here from the Superga website.
For the rest of the girls' outfits in the photos linked above, please check the Little Mix label.
Item images via Forever 21 & Lazy Oaf.
