The Geordie Shore star's choice of a sparkling white mini-dress complemented her deep tan, while her black wedge heels made her bare legs look sky high.
The Celebrity Big Brother winner tweeted her excitement after arriving at the award ceremony, saying: "Backstage at radio 1 teen awards! Its crazy!!!"
She joined the likes of Rita Ora and Taylor Swift on the red carpet, who both dressed to impress in their own unique styles - Rita also wore white, while Taylor dazzled in an elegant green frock.
The event, which took place at Wembley on Sunday (November 3), featured performances from Jessie J, Tinie Tempah, Rizzle Kicks, Fall Out Boy, James Arthur and Icona Pop.
Nominated for Best British Group, Little Mix arrived looking preened and polished. But underneath the calm exterior, Leigh-Anne Pinnock admitted she had "butterflies" in her stomach.
Pixie Lott also defied the increasingly cold temperatures in a sky blue bra top, with matching mini-skirt.
Fearne Cotton looked every inch the rock chick in a tiger t'shirt, fluorescent mini skirt and black tights. She couldn't contain her excitement about the event, tweeting: "On my way to the Teen Awards. Now everybody screammmmmm."
She later added: "Just had a nice ten minute chat with @LittleMixOffic in the loo at wembley, love ya girls."
Nick Grimshaw hosted the event, with a little help from bessie Rita Ora.
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Watch the video to Taylor Swift's single 'I Knew You Were Trouble':