Get 3 rings. 1 Larger one, 2 smaller ones. Wire tie (or spot weld or whatever works) them together in a fashion where the smaller rings are the ears and the larger one the face. Get lights and tie them around the outside of the rings, now in the shape of Mickey's head.
The rings can be the type for a "Wreath" or just rings that you can probably find at any craft store (Metal, wood, plastic, whatever works).