The two friends have remained super close since Lauren left the hit reality TV series in 2012 and so it's no real surprise that they decided to ring in the New Year side by side on Tuesday (31 December).
And of course, they looked their very best for the occasion!
Lauren - who split up with boyfriend Jake McLean in December - went all out for the evening in a short black lace dress, which revealed a sneaky peek of her bra underneath for that extra wow factor.
She also styled her hair to perfection in huge, bouncy curls and appeared extra bronze with lashings of fake tan.
Taking to Instagram, 27-year-old Lauren couldn't wait to show off her glamorous evening ensemble and posted a handful of selfies and photos with her friends, including Frankie.
Beside one of the pictures, she wrote: "Sober .. Hope everyone has a good NYE I love you all."
Meanwhile, Frankie contrasted with BFF Lauren and still seemed to be in the Christmas spirit by going for a snowy white coloured New Year's frock with cut-out sections and silver detailing.
The TOWIE regular completed her party look with voluminous hair, which she achieved by placing large rollers in her locks before heading out.
And she even took a selfie in the rollers, while wishing her fans and followers a Happy New Year!
Joining Frankie on her girls night with Lauren and the Essex ladies was her boyfriend.
The couple posed for a picture perfect photo at the beginning of the evening, with Frankie's man looking dapper in a grey suit.
The blonde reality TV star then swiftly uploaded the photo on Twitter and wrote: "Me and my baby! Happy new year guys xxxxxx"
It certainly seems as though both Lauren and Frankie are ready to make the most of 2014.
What do you think of Lauren and Frankie's NYE outfits? Let us know below, as the best comment from across the website each week wins £50!
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