Beautiful flower. I think the shapes of the petals work really well in this, like they're playing with the white, then curving in, then jumping back out.
There is a few problems with the background. Looks like lace? Should have dodged it out in my opinion but there is good detail on the flower and the composition is nice.
Lovely and delicate. There is a nice sense of transparency on the upper petals, but there is also a lighting flatness. The reflection is very pixilated.