For this drawing, I picked the background image of Madonna’s YouTube page as a reference. I made her a slight caricature of her face and body, to hopefully avoid any nasty lawsuits.
I used three layers. The layer with the coloring on the bottom, on top of that the layer with the inked drawing, with the white color removed and on top of that a layer with 80 percent transparency and everything black that not white in the scanned inked drawing, if effect darkening the marker drawing.
That is all.