Kendall Jenner and Gigi Hadid trade hair colours at Balmain

Yes, that's Kendall Jenner - we had to do a double take too when we saw these photos! The supermodel swapped hair colour with BFF Gigi Hadid for the Balmain show at Paris Fashion Week...

Victoria's Secret supermodel Alessandra Ambrosio shared this pic of herself posing with Karlie Kloss backstage. "Blonde have more fun," she captioned the fun snap.

Rosie Huntington-Whiteley went over to the dark side, swapping her blonde locks for an almost jet-black mane.