The ornamental design for a hairband, as shown and described.
FIG. 1 is a top plan view of my new design, the undisclosed bottom of the
hairband follows the contours of the portion shown except for
irregularities in the fabric gathers;
FIG. 2 is a front elevation view of the hairband of FIG. 1, the undisclosed
rear of the hairband follows the contours of the portion shown except for
irregularities in the fabric gathers; and,
FIG. 3 is a left end elevation view of the hairband of FIG. 1, the
undisclosed right end of the hairband follows the contours of the portion
shown except for irregularities in the fabric gathers.