Halloween is fast approaching, have you got your costume sorted yet? Well, there's still a bit of time to pull something together so why not channel Katy Perry's California Gurls look. The multi coloured ensemble (which has already been rocked by Holly Madison) will certainly make you stand out, but might require a spot of DIY! A purple bob is key for the look along with some pale pink tights and a heart headband. I would also layer up some candy necklaces and stock up on coloured ribbon. Finally, buy a cheap bandeau dress in white or cream and attach some of your favourite sweets or wrappers to it to add colour. Who are you dressing up as for Halloween?