DIY: Mirrored ceiling medallion (for under thirty dollars). Or less if you use mirrored wall decals. Same idea could be used above ANY light, even the typical floor or table lamps. Just add one or two mirrored wall decals. ;)
cheap DIY. jazz up your builder mirror: Create a frame with Tile. Even if you choose super expensive tile, this is a cheap option because you only need a few feet for a frame (measure and calculate based on your mirror’s dimensions). Use caulk to glue the tile onto your mirror and then grout.