Perrie Edwards, 23, flashed her pert bottom in a pair of racy wet-look knickers and sexy fishnet tights, adding over-knee lace up boots and a bright neon crop top to finish the ensemble.
The blonde bombshell wore her long locks in loose waves with two small plaits keeping her hair back from her face as she launched herself into Little Mix's raunchy dance routines in front of the delighted crowd.
Her bandmate Jesy Nelson, 24, wore matching bottom-baring briefs and a bold purple patterned top as she debuted her newly blonde locks at the weekend festival.
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Little Mix's Perrie Edwards and Jesy Nelson flashed her assets at Big Weekend
Perrie flashed her peachy rear in a pair of skimpy wet-look knickers
Jesy flaunted her curves in a matching outfit as she debuted her new blonde locks
The curvaceous beauty flaunted her peachy posterior in saucy fishnet tights, which also matched Leigh-Anne Pinnock's outfit as the foursome sizzled on stage.
Leigh-Anne, 25, opted for a neon yellow hoodie dress, which flashed her knickers as she raised her arms above her head during their performance.
Meanwhile, Jade Thirwall, 24, kept her pins and behind under wraps in a pair of camouflage trousers, choosing instead to flash the flesh on top in a revealing black and purple bralette, showcasing her toned abs.
Little Mix took to the stage at Radio 1's Big Weekend in Hull
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Jade opted for camouflage trouser sand a racy bralette
Earlier today, Jesy took to Instagram to give her 2.9 million followers a sneak peek at her new hair colour, posting a busty selfie with her golden tresses cascading over her shoulders and chest, captioning the snap simply: Radio 1 Big Weekend!"
Little Mix fans flooded to the comments section to gush over her fresh look, with one saying: "Stay blonde it looks so good kween." (sic)
"Blonde?! Oh my god, you are so gorgeous," another added, while a third said: "I am living for the blonde haired Jesy."