The girls - and a few extra pals - bravely posed for a cheeky picture in nothing more than a tiny thong on Thursday evening (12 September) in a bid to show their Twitter followers how brown they'd all become after their impromptu spray tan party.
Sam uploaded the photo and in case their was any confusion as to which bottom belonged to which lady, she wrote: "From left2right.. Stacey, Ferne, Sarah, me & Billie @fakebakeunited @TheTanExpert all tanned up for the weekend! ;)"
And they all appear to have co-ordinated the colour of their thongs too!
It sounds like the reality TV stars are determined to turn heads this weekend with their new tans and Sam has even made sure to fit in some extra pampering to look her very best.
As well as bronzing her skin, the Minnies Boutique owner also revealed that she'd had her eyebrows and nails done earlier yesterday and managed to squeeze in a personal training session too.
Sam, Billie and Ferne have each made no secret about the fact that they are currently following a strict workout routine in a bid to get in shape for the TOWIE trip to Las Vegas.
The trio have been keeping their fans up to date with their progress and seem to have become real fitness fanatics in the run up to their holiday.
This morning (13 September), Ferne got her workout in early and tweeted afterwards: "Another amazing workout @FFactoryuk last one of the week! Until next week.
The TOWIE cast will be jetting off to Sin City to film two special episodes for the new series of their hit show.
And it looks like it's going to be a battle of the bikini bodies once they're out there!
Would you ever post a cheeky snap like Sam? Let us know below, as the best comment each week wins £50!