I like this contrast of details! I personally think you can capitalize on it. The black BG isn't doing much for the piece, I think with some cropping and incorporation of existing colors you can use the contrast of details to your advantage and frame the detailed face region; example link, hope you don't mind the edit sorry if you do
Again that's just a personal opinion, I think this piece is beautiful! Her face is so lovely as are the colors. Beautiful.
The face is absolutely top-notch. I'd love it if the rest of the image had the same amount of attention paid to it.
You use solid colors to denote contrast and semplicity, so you have to aim to get contrast in the piece to show the cluster.
Look at all the pieces that copy the ipod poster. Orange over black, blue over pink....people used high contrast combinations.