Chevy Chase
Chevy Chase is notoriously hard to work with, and his alcohol problem makes things even worse. Many of Chase's costars on Community despised him, who would purposefully ruin everyone's day on set by belittling the rest of the cast. He would try to pick out their flaws and mock their appearances. There's a reason you haven't seen much of him, recently...
Jerry Seinfeld
In the 1990s, Seinfeld defined the future of the sitcom comedy genre. Naturally, the fame went to Jerry Seinfeld's head over the years. According to a handful of witnesses, Jerry was caught in an awkward exchange between himself and pop sensation Kesha. When the singer tried to approach the comedian for a hug, he replied, "No, thanks," and put his hand between them. Seinfeld thought he was too good for her!