The callous Stern turned from guest to critic during "Late Night With Jimmy Fallon" on Monday night. "You're competing against Letterman, Jimmy Kimmel," he shot at the host. "It's a jungle — you don't have the killer instinct." Someone out there must like Fallon, though; the comedian's transition to 'The Tonight Show' comes with a billing addendum "Starring Jimmy Fallon."
Theo Wargo / Getty Images
Copyright © 2018, CT Now