FIG. 1 is a perspective view of a message sticker showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a reduced perspective view of the message sticker of FIG. 1 shown in association with an environment; it is understood that the broken lines are for illustrative purposes only and form no part of the claimed design.