To get more character customizations, go onto the Lifeinvader social network. If you log in and begin "Stalking" people, you will begin unlocking new character customizations. To get new hair styles for instance, stalk Herr Kurtz Barber.
When I go to Lifeinvader in-game it only shows Michael's page and no search bar anywhere. How do I stalk this Herr Kurtz dude?