This reality star’s latest Instagram post has us in total shock!

With the "first Facebook profile picure" trend that's been knocking around for the last few days, we've seen a lot of snaps of our pals looking shockingly barefaced, youthful and basically nothing like themselves!

Now reality star Ferne McCann has left us similarly gobsmacked with the throwback picture she posted of herself and pal Billie Faiers as teens. The TOWIE beauty, who is currently recovering at home after a stint in hospital earlier this week, shared a snap of the pair in honour of Billie's 25th birthday:

That is some SERIOUS duckface!

The throwback snap was captioned, "HappyBirthday @BillieFaiers had to post this. I went through a stage of wearing kaftans to clubs #13yearsoffriendship." What a change from how the girls look now… although they've kept their pouts!

Billie showed she's moved on from her teen years with a sweet snap from her birthday celebrations at home this morning. The 25-year-old shared a picture of her daughter Nelly holding a birthday card with the caption, "Happy birthday mummy!!! The best present anyone could ever ask for. My beautiful little Nelly."

So cute.