The ornamental design for smile jewelry, as shown and described.
FIG. 1 is a front, top and left side perspective view of an embodiment of the design of the invention;
FIG. 2 is a right side view thereof (the opposite or left side is a mirror image);
FIG. 3 is a top side view thereof (the opposite or bottom side is a mirror image); and,
FIG. 4 is a back side plan view thereof.
The hook shown in dotted lines in FIG. 1 is solely environmental and forms no part of the claimed design (as hooks having a variety of shapes and sizes may be used in connection with the claimed design).