What you'll need:
Step 1: Print out a black-and-white picture of your favorite celebrity.
Step 2: Do a rough pencil sketch.
Step 3: Spoon out your "paint" on to a plate.
You need a little light- and dark-colored ice cream along with a pinkish-hued one. You don't HAVE to use Ben & Jerry's brand, but I find it the best for eating while working. Be sure to eat a couple spoonfuls during this step.
Step 4: Block in the shadows.
Step 5: Paint in smaller dark details.
Step 6: Paint in the lighter values.
Mix the chocolate and vanilla to create lighter shades; fill in the brighter areas on the face. You can also mix in some pink so give it a warmer hue. Again, be sure not to forget to continue eating the ice cream throughout the whole process.