Celebrity Face Swap
Step 1: Download two celebrities from the Google folder (or download two celebrities of your own choice from the good ole internet- try to find two that match camera angles and lighting) and open both of them in Photoshop. Start with one and select the "Lasso" tool in the tool bar.
Step 2: Draw a freehand selection with the Lasso tool of the face (not the full head).
Step 3: In the Options bar, click on "Select and Mask..."
Step 4: Move the "Feather" slider over until you get a nice fuzzy edge. This will help you blend the face onto the other. Ewww.
Step 5: Use the Move tool in the toolbar (top tool- looks like a plus sign) to drag the face into the image of the other celebrity you chose. In the Layers palette, slide the opacity slider down a bit so you can see through the added layer and line their features up with the other celebrity more accurately. Slide it back to 100% when you're done.
Step 6: Use "Free Transform" from the Edit menu (or Ctrl T) to resize the face and/or rotate it a bit so that it lines up. Double click in the Free Transform box to set the size.
Step 7: Add a Layer Mask to the added face layer to help further blend his face onto the underlying image. Select the Paintbrush from the tool bar, make sure your foreground color is set to black, and slide the Opacity slider in the Options bar to about 50% percentish. Paint away any areas that need taming.
Step 8: That's pretty much it. Try swapping in reverse! Hmm...yeah.
So what do you do when the skin tones don't match, like in the example below? Keep reading.
Select "Levels" from the Adjustment Layers menu. In the Properties tab, click on the "Clipping Mask" icon (looks like a square with a down arrow attached).
With the Clipping Mask selected, you can now lighten, darken, or change the color of that layer without affecting the underlying layer.
Just like the first example, you'll need to make a layer mask in the added face layer to cut away where his face overlaps her hair (you may need to increase the opacity of your brush to 100%). That's gorgeous. Now sit back and enjoy your celebrity monster. Maybe send it to some friends and make/ruin their day.