Tutorial by request. Done in Photoshop CS, but I'm told it translates to PSP as well.
||Cropped base from caps by dj43.
||Duplicate base twice, set to Screen 100%.
||New layer filled with dark blue (I used #011435) set to Exclusion 100%.
||Duplicate the base and drag it up to the top; set to Screen 100%.
||New layer filled with light blue (I used #C9DBEB) set to Color Burn 100%.
||Erase the blue parts off of faces and skin.
||Duplicate the blue burn layer.
||New layer filled with pink (I used #B46894 pulled from her dress), set to Color Burn 100%.
||Erase the parts off everything but her dress.
||Duplicate the pink burn layer and lower the opacity to 50%.
||Create a new layer and stamp a copy of everything you've done so far in the new layer by pressing CTRL+ALT+SHIFT+E. Duplicate that layer and set the top one to Soft Light.
If the icon needs it, sharpen at this step, on the soft light layer. Fade sharpen as needed.