Katy Perry has debuted her new hairstyle and her colour of choice is 'slime green'.

The Dark Horse singer showed off her chopped, green locks on Instagram captioning the photo, "Slime green for spring by my bb's @neeenaboo & @brantmayfield at the @mcmillansalon."

The colour change isn't a shock to fans however with Perry hinting that a change in colour might be on the horizon back in March telling E!, "I've wanted to go slime green for a long time. It's spring time and I think it's time to freshen up my look."

She added, "I'm really excited about slime green, but I hope my hair doesn't fall out."