We don't have to tell you why a little black dress is a wardrobe staple for every woman, but sometimes it's necessary to put a slight spin on a classic. While there will always be a time and place to look your black-dress best, balmy Summer weather brings its own style conundrums and often requires something a bit more lightweight. Enter the impossibly Summer-perfect LBD: it's the ideal combination of sexy cocktail frock and breezy beach dress and can easily be dressed up or down depending on your destination. Whether you're heading to a Summer wedding or just need a new, more floaty version of your regular LBD, we've rounded up 15 pieces that are perfect for the warm-weather season. Click through now to see and shop each one.