A puzzle suitable for the age group can be the perfect gift. Since all the boxes have ages printed on the side, this will be an easy task. If you know the child well enough to know the sort of movies they like to watch, you can make an educated decision. If you don't know him or her well, Disney flicks are a good bet. Keep the receipt in case they already have it and stick with the latest releases as it's more likely they haven't recieved that yet.
Gift certificates make great gifts for teens.
Choose a music or clothing store that has lots of young people hanging out at it and purchase a gift certificate. Or you can get one for Starbucks, or another popular coffeehouse in your area. Soaps are always a safe bet when dealing with teenage girls. Elegant or smelling soaps are perfect for the job. You can add a matching body lotion or shower gel and color-coordinated bath oil bubbles for a gift basket.