It feels like just the other day the 'Tik Tok' singer flaunted rainbow tresses, and now she's dyed her barnet a sugary sweet multicoloured hue.
The starlet showed off her image overhaul while heading to the Jimmy Kimmel Live! TV studios in Los Angeles yesterday (14 October).
She opted for a sky blue shade along the mid-lengths, with a candy floss pink near the front and a mermaid green on the tips.
Her girly mane was tonged into loose curls, and she accessorised with dark sunnies and her trademark nose ring.
Pastel locks are seriously hot right now, but if you're not feeling quite as brave as Ke$ha, try a temporary ombre style.
Get the look with Kevin Murphy Color Bug, £13.95, a super-pigmented powder-like product which you wipe directly onto your strands for a colour hit.
It's easy to apply and washes out with shampoo, so you can switch up your bonce whenever you please.
Ke$ha would be proud.
What do you think of Ke$ha's new hair? Let us know by commenting below as the best comment across the site each week wins £50!