Taking part in the same campaign as Katie is Jamie Theakston, who chose to appear as rock icon Freddie Mercury.
"Freddie would have been 70 this year and chances are he would still be with us if he hadn't died just two years before breakthroughs in treating HIV," he said.
"Dressing loud is all about expressing yourself to help others and no one did that quite like him. It wasn't easy trying to recreate his iconic look – there was no one else quite like him and I don’t think there ever will be. I think I look more like a tall Manuel from ‘Fawlty Towers’ or someone auditioning for a Queen tribute band than Freddie. If, by making a fool of myself, it means that just one small charity gets a chance to assist someone who needs their help, then that’s time well spent!"