Great job of controlling the soft blur here. The stark white background really makes it jump out.

this just says 'blurry' to me.
all the same, cool effect.

The "pinching" around the arms is not attractive to me. Good idea, tho...

soft it is ...

Out of focus does not always say soft!

I like this image - it certainly says soft in the focus, but there is also enough form to it that I see a chick with a guitar. :-)