Select the three layers below the Curve layer. Drag them down to the New Layer button to duplicate them. Hit Command+E to merge the three duplicates.
Select the Polygonal Lasso Tool and click around her face until all the skin is selected. It doesnt need to be too neat. Now go back, and while holding Alt, click around and deselect anything that is not skin like the eyes, eyebrows, lips, and nostrils. Go back once more and deselect any areas of detail that need to remain, like the edge of the nose, her dimples, her collar bones, and the edge of her chin. This is what my selection looks like as a quick mask: