Make use of the next command Layer ? Remove Layer Mask ? Apply and then decolorize the sky: Image ? Adjustments ? Desaturate (shift+ctrl+u). Open in a new window the picture of a ballet-dancer (ctrl+o).



Mark out her contours, using the instrument from here: Polygonal Lasso Tool.



Make a copy of the picture (ctrl+c) and insert it on a new layer, above the sky's layer (ctrl+v). Make the necessary corrections on the picture's size if that is necessary (ctrl+t).



Now we should copy the layer containing the ballet-dancer (ctrl+j) and blur it out on its radial direction, selecting Filter ? Blur ? Radial Blur, setting the center approximately on the place the girl is situated on.



Create a mask out of the layer: Layer ? Add Layer Mask ? Hide All and make visible the layer only along the girl's dress's edges, using the Brush Tool with smooth edges of white color.