Khloe Kardashian did it aaaages ago. Blake Lively had a go for a while. Scarlett Johansson's tried it a few times. Now it's Katy Perry's turn. No, we're not talking about celebrities, er, 'extracurricular activities', but rather their hair colours. The poptastic Katy Perry is the latest star to debut ginger-inspired locks; although she claims hers happened by accident. "So I didn't get to the exact color I wanted from being black for so long! 2get to goal I have 2b GINGER for 3WKS," she tweeted. Did you know the usually raven-locked star is actually a natural blonde? We actually think the ginge kinda works for Mrs Russell Brand, although we're pretty sure she could pull off blue and green hair and still look hot. What do you think? Will you be trying the red rage?