You know you were a '90s girl if . . . these costumes are what you've been dreaming of. From old-school Britney Spears to Sailor Moon, these looks are based on the moments that defined your Lisa Frank-filled childhood. So if, like Cher, you're more into shopping than DIY-ing your costume of choice, we're here for you. These looks are easy to throw together, and the best part — the clothes are all pieces you'll want to wear again. Just keep reading to shop.