Britney Spears Halloween costume!! As many of my friends know, I love Britney Spears. So, they loved me enough to be her with me for Halloween. My costume was from her VMA performance "I'm a slave for you". I bought a bra from Goodwill and sewed a couple layers of green fabric over the top of it. Then for my bottoms I tied some blue strips of fabric around my shorts along with a gold chain. Put a snake and some sparkles on and you're good to go (even if you don't have blonde hair).