I did some editing on the original shot posted before. Actually I tried to get some "bokeh-spots" into the background. Painting artificial bokeh-spots with some of the available brushes didn't really satisfy as the results were so unnatural... in the end I ended up copying a part of a different shot in into a layer and adjusted the blending mode.
Tokina AF 100mm f/2.8 AT-X Pro D macro
at f/4.5, 1/250sec, ISO 100
a little bit of fill flash with SB-900