Your outfit isn't complete until your hairstyle matches your neckline. This complete guide breaks down all eight necklines — boat neck, off-shoulder, turtleneck, strapless, square neck, sweetheart, V-neck and halter — and the best hairstyle to pair with each one. From sleek low buns to soft waves, high ponytails to voluminous curls, learn exactly how to style your hair for weddings, parties, dinners and every big occasion. Save this guide and never second-guess your getting-r