My attempt
I did the multiply blend,
flattened,
duplicated background,
cut out dress and shirt (I should of done these separate),
turned it to Grey scale 75%blue 15%green 10%red,
changed blend mode to Linear blend,
set Opacity to 33%.
It still needs the dress layer making a bit lighter at the top to eliminate the 'dirty' look, maybe a graduated white from the top of the dress to somewhere near the hips ??
I don't know if the dress was pure white or had a blue tint, but there is plenty of room for playing with the settings.
Cheers David