It's different. I like the idea. But it somehow fails to be sexy, or appealing. The ultra-shallow depth of field is often a good idea, but in this case it rather takes away the shape of the figure, and I find that unattractive.
Great idea for the challenge! I alway like how many skin-tones compliment purple so well. Maybe a tad bit more depth to keep the right side of the body in focus, but overall, very well done! 8o)