In her "Good Girl" music video, Carrie Underwood wears a flowy Elizabeth and James 'Monet Flower Maxi' dress which retails for $665 at shopbop.com. Not what you'd consider budget friendly, right? But wait! You can rent Carrie's dress instead at a fraction of the price over at RenttheRunway.com. It's still not "cheap" at $125, but for a special occasion, it's a real steal. I rented a Halston Heritage dress and Kenneth Jay Lane necklace for an event a couple months ago and the whole process was easy and fun. I can't say enough good things about the customer service, too. If you've got prom coming up or summer weddings, definitely give RenttheRunway.com a look before you splurge on a gown that you may only end up wearing once or twice.