The 22-year-old cosmetics billionaire treated her 162 Instagram followers to a mirror selfie of her sporting a luxurious new honey blonde hairdo.
Pulling her best supermodel pout for the camera, she wrote: 'new vibe' in the caption with a black heart emoji on Valentine's Day.
Days earlier her older half-sister Kim Kardashian had posted Insta Stories footage of herself with a similar new shade of hair.
'So Kylie and Khloe thought that they were going to beat me to this hair color - I got 'em!' boasted Kim as she flaunted the do for her fans.
However, Kylie was not fooled - she posted a grab of Kim's Insta Stories to her own social media and wrote: 'we know it's a wig'.
The new 'do comes one day after the lip kit mogul accused her hairstylist Jesus Guerrero of cutting off all her hair, along with an accompanying visual of a short, slick bob.
Earlier this week Kim celebrated reaching a staggering 160 million followers on Instagram - just two million behind Kylie.
Kim was actually ahead of Kylie until early January, when the younger reality star thundered up to 156 million past her big sister's 155 million.
Kylie recently threw a massively extravagant second birthday party for her daughter Stormi, whom she shares with her ex Travis Scott.
As she did with the little girl's first birthday, Kylie set up a whole Stormi World whose entrance was a giant blow-up replica of the baby's head.
The lip kit tycoon splashed out on a spinning Dumbo ride and a mechanical claw over a tub full of inflatable Stormi heads.
Her party venue was so gigantic that guests were given maps to help them find their way around the various 'Worlds.'
Along with a dedicated Stormi World there were also areas dedicated to the animated children's movies Trolls and Frozen.
© Associated Newspapers Ltd.