Although prom is a few short months away, now is the time to start shopping around for a dress. A lot of my teen Cheap Chicas out there really don't have a lot of money to spend on a gown, and why should you spend a lot on a gown that you're going to wear for one night anyway? Here are some dresses I've found for under $100. Hell, some are even under $20! Throw on some fab jewelry and a cute clutch, you'll be the belle of the ball. You could also try your local thrift stores, consignment shops, and bridal outlets. Or, if you know someone who sews, just grab the material and pattern and have them make it.