The TOWIE star, 29, let her black tresses tumble past her shoulders in bouncy curls as she showed off her new 'do.
Lauren captioned the shot: "Dark side."
Doesn't she look INCREDS?
Lauren teamed her new black hair with a feline flick of eyeliner, peachy lips and her perfectly coiffed brows.
Oh, and let's not forget the glimpse of her boobs thanks to a low-cut, laced-up top.
Lauren's fans were quick to cheer her new style, with one pointing out that she looks just like Megan Fox... and we totally agree!
On Boxing Day, Lauren shared the first snap of her new 'do and told her Insta followers: "Hope everyone had or having a good Boxing Day - today I dyed my hair black haha sorry for the posing video I'm just chilling watching Elf and wanted show you my new hair."
Now that she's switched up her make-up to match her new locks, we think she is totally owning it!
What with that and her fabulous, gym-toned body, and it's top marks to LG right now.
Watch Lauren tease her new black locks here...
Laters, we're off to dye our hair too.