Keeping her Instagram followers updated on her day, Kendall posted this snap along with the caption: "So many great looks on set today! @bryanmarryshow @rcidphoto."
On the left-hand side of her snap, Kendall looks her usual self with subtly defined eyes, natural coloured lips and a sunkissed glow.
Her hair is damp and she's rocking what looks like a strappy leather top paired with a biker jacket.
But on the right side, Kendall looks almost unrecognisable, sporting no mascara and a slightly paler complexion.
The biggest difference? Her brows! It looks like natural brunette Kendall may have bleached her arches, making them almost invisible.
Kendall's snap reminds us of the time Miley Cyrus' eyebrows appeared to vanish in November 2013, and when Lady Gaga dyed hers in July 2013.
Oh, and who remembers Pixie Lott's bubblegum pink arches?!
What do you think of Kendall's selfie? Let us know by commenting below as the best comment across the site each week wins £50!
Got an iPad or iPhone? Reveal Mag is specially designed to fit!