Ellen Degeneres showed up on time for the first taping of this season’s American Idol Hollywood segment. Simon didn’t. Miss Degeneres said Cowell is a prima donna, and rang-up Mike Darnell, the programming chief and told him to find Cowell’s replacement pronto. LOL! By the way, everyone wants former Sony producer and Mariah Carey’s ex-husband, Tommy Mattola, to replace Simon, but Simon wants Mattola for his new X-Factor. Read it here.