The 'Price Tag' singer told fans yesterday (18 November) that it was "time for a change" and hours later posted the results of her hair transformation to Instagram.
The former Voice UK judge appeared make-up free in the selfie, as she showed off her pixie crop. We must admit, we're loving Jessie's latest look!
Captioning the photo, she said: "And just like that... blonde to black #imback."
The 25-year-old, who is known for getting creative with her hair, added: "A FEW hairstyles I have had over the past 3 years. It's so fun to CHANGE and experiment!"
Jessie dyed her hair blonde on her 25th birthday, shortly after making the brave decision to chop off her locks for Comic Relief, raising thousands of pounds for the charity in return.
Jessie certainly knows how to pull off a powerful hairdo and switched up her blonde hair in recent months with a pixie crop and textured quiff.
What do you think of Jessie's new hair? Tell us below as the best comment from across the site each week wins £50!
Watch Jessie's music video for 'It's My Party' below: