Become a real California Gurl with this Katy Perry Blue Wig for Kids! Pair it with our Candy Girl costume and you’ll look like the real thing. This adorable and officially licensed blue wig is great for parties, dress-up or as a Halloween costume. You could even make your own music video. This costume accessory includes the bright blue wig and headband. It comes in one size to fit most girls. Plastic. Hand wash if necessary.