The singer debuted her brand new look on Instagram last night, posting a pic of her freshly dyed tresses. "SLIME GREEN FOR SPRING," she captioned the image, after getting her hair did at The Chris McMillan Salon.
It's definitely a different look for Katy, who has been rocking a black bob with blunt bangs recently -- but she's also no stranger to brightly colored locks.
In the past she's sported a variety of candy-colored wigs and has also dyed her mane blue, purple and pink.
What do you think of this latest color of the rainbow? Vote below and see more of Katy's wildest looks above!