We do love a game of Celebrity Guess Who? here at HuffPost Celeb but these snaps had us all narrowing our eyes and scratching our heads as we tried to work out who it was parading around in her smalls in these pics before they were famous.

And just in case you missed the headline (bit of a giveaway), it's 'TOWIE' star Gemma Collins.

Yes really.

gemma collins

Gemma was obviously feeling a bit nostalgic over the weekend as she took a peek through her family album and shared two snaps on Twitter.

The first sees a slimline Gemma posing in some pretty gruesome gold underwear in what looks like an office. After hours. Call the HR police!

Next to the pic the star wrote: "Can't believe how slim I used to be looking through old pics x."

gemma collins

And the oh-dear-most of-my-clothes-have-fallen-off theme continues in the second snap, which sees Gemma pouting, wearing a halo and not looking at all angelic.

gemma collins

Gemma as she looks today

The 'Only Way Is Essex' star has been open about her battle with her weight since joining the show two years ago. Viewers of the reality-soap have seen her try countless diets and enrol at bootcamp and she recently revealed she'd turned to diet bills in a bid to shift the pounds.

HUFFPOST UK CELEB ON FACEBOOK | FOLLOW US ON TWITTER

gym competition

Loading Slideshow...
  • At her thinnest Natalie wanted the whole world to know she'd lost weight. An inevitable work out DVD followed.

  • Former 'Loose Women' star Denise Welch lost over two stone after becoming the face of LigherLife and taking up a new fitness regime in 2013.

  • The Steps singer managed to shed the weight she gained after the band split, but then she fell pregnant and battled to lose it since.

  • Gastric-band-gate swept the nation when it was revealed Fern hadn't exactly told the truth about her weight loss.

  • Dawn French was always been known for being a bit on the larger side, and that's why we loved her. Well, there's less of her to love now as since her split with Lenny she's shed a fair few pounds.

  • That picture on the left actually scares us. It's like she wants us to motorboat in that cleavage. Bleugh.

  • Bristolian comic Justin Lee Collins has gone from rock-sized to rock star after dieting.

  • Former Emmerdale actress Pauline Quirke lost several stone after being told she was morbidly obese.

  • It was revealed that Geri's dramatic weight loss was due to an eating disorder. Luckily she's settled back to a healthy weight now.

  • He's the man of the moment on The X Factor, but after the original Take That split Barlow ballooned.

  • James Corden's role in <em>One Man Two Guv'nors</em> helped him to shift over five stone.

  • TOWIE's Gemma shed four stone on a bid to win Mick Norcross. She gave up the bags of crisps but didn't manage to bag the bloke. Good job she's got Arg now then.

  • Pete's frame isn't the only thing shocking here. WTF is with that hair? Anyway, Pete shed the pounds when he split with Jordan. We didn't hear anything about that?

  • Eh up, don our Kerreh look slim. Must 'av been on t'Weight Watchers.

  • Jack Osbourne has struggled a lot with his size and is still yo-yoing with his weight now.

  • Gerard Butler has never exactly been a porker, but he's swapped his stocky frame for a much leaner one.

  • Jessie Wallace looked unrecognisable after slimming down, but since returning to Easties, Jessie has regained Kat's curvier figure.

  • <em>Superbad</em> actor Jonah Hill made jaws drop across the world when he unveiled his new look at an awards bash. He's hoping to lose more too.

  • The once teeny weeny, leather-chaps wearing Christina Aguilera got tongues a-wagging when she ditched her slight frame.

Also on HuffPost: