To create a Celebricon, one must use visual aids to create a phonetically similar sounding name of a famous human. You can't use a picture or likeness of the intended celebrity.
See the examples below:
Above we see a Gym being carried. However unlikely, it does sound a whole lot like Jim Carrey. Thus a Celebricon is born. Below we see a Driver that is so small it could be called a Mini Driver:
Now that you're armed with the specific rules behind the Celebricon concept you can properly imagineer a new one. We suspect there aren't many legit Celebricons left out there in the psycho-ether, so good hunting... (It's a brain exercise that increases blood flow to critical problem-solving tissue)