The Keeping Up With The Kardashians star shared a picture to Instagram today showing her reclining in a bikini and sporting a platninum blonde wig.
Wow! What a difference!
We think she was channelling a bit of a mermaid look as she captioned the image: "Shipwrecked."
Kourtney is one of the only Kardashians not to have tried blonde hair at some stage in her life, but judging from her fans' comments, they reckon she would rock it!
We wonder if she'll be brave enough to try it out?!
Her little sister Kim caused a mega stir earlier this year when she rocked up to Paris Fashion Week sporting incredibly bright blonde locks slicked back, a very different look to the brunette bob she'd been rocking before.
And Khloe Kardashian is currently blonde after ditching her ombre tresses for a summery golden tone.
All you need to know about Kourtney Kardashian in just one minute:
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!