The ornamental design for a ceilingmolding, as shown and described.
FIG. 1 is a perspective view of a ceiling molding showing my new design;
FIG. 2 is an enlarged exploded top perspective view taken one section of the ceiling molding, all four sections being the same, the bottom perspective view being the same as the top;
FIG. 3 is an enlarged exploded left view of FIG. 2;
FIG. 4 is an enlarged exploded right view of FIG. 2;
FIG. 5 is an enlarged exploded top view of FIG. 2; and,
FIG. 6 is an enlarged exploded bottom view of FIG. 2.