TWISTED KNOT HALF BUN HOW-TO: This messy style is sexy and perfectly undone, plus, it gives your half bun a more voluminous look! Create the style by pulling some hair up into a high ponytail. Split the ponytail in half and loosely twist the ends. Then wrap them in opposite directions around the ponytail base and secure the ends down with bobby pins. Click through for the full directions and more trendy half bun style ideas!