Have you ever noticed the characters in iCarly wearing random t-shirts? They are Penny-Tee's and are a long running joke on iCarly! Created by Socko's sister, Penny, the shirts feature a crazy phrase and have a penny sewn on one sleeve's hem. How many episodes feature the Penny Tee? 40! There is even a special episode dedicated to Penny Tee's called iSell Penny-Tees.