The ornamental design for an interchangeabledecorativefeature, as shown and described.
FIG. 1 is a perspective view of an interchangeable decorative feature showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the shoe (FIGS. 1-7) incorporating the interchangeable decorative feature is for the purpose of illustrating environmental structure and forms no part of the claimed design.