The ornamental design for a hairrollerball, as shown and described.
FIG. 1 is a front elevational view showing my new design for a hair roller
ball, the rear view appearing the same; and wherein each of the lines
shown represents a row of fastening filaments such as those shown on the
periphery of the FIGURE; and,
FIG. 2 is a top plan view thereof, the bottom plan view appearing the same.