Perry, 26, started off wearing a bright blue wig and a green dress, which quickly made way for a candy-striped dress--to match the oversized lollipops on stage, of course! Later on, she changed into a bright pink dress covered in white hearts, and then a blue princess-inspired gown.And style-savvy Perry is in Milan at the perfect time: It's Fashion Week there. And before her concert she attended a Vogue Eyewear dinner party--in a pink leather dress!