From Secret Santa gift exchanges and office holiday parties, to going back home (and running into everyone from your past) and New Year's Eve extravaganzas, your datebook for the next few weeks is full as hell — and your wardrobe isn't quite ready for all that.But, just because you have a ton on your agenda and nothing to wear doesn’t mean you have to go broke getting prepared. In fact, there are tons of good dresses at affordable prices online. And thankfully, your day won't need to be spent frantically scanning site after site to find ones guaranteed to make you look good: We’ve done all the hard work for you. Ahead, you’ll find 20 of the most flattering special-occasion-worthy dresses, each priced at less than $100. With all the fun times ahead, you might just need to pick up everything we’re putting down.