The ornamental design for a stilettoshoe, as shown and described.
FIG. 1 is a perspective view of a stiletto shoe showing my new design;
FIG. 2 is a rear view thereof; and,
FIG. 3 is a bottom view thereof.
The broken lines shown in the drawings represent portions of the stiletto shoe that form no part of the claimed design. All sides not shown form no part of the claimed design.