David Letterman Surprises Jimmy Fallon

Live' veterans participated in a "Tonight Show Joke Off," a riff on SNL's "Weekend Update" segment during which they battled it out for the best punchlines.
Tina Fey, Amy Poehler, and Seth Meyers appeared on 'The Tonight Show' alongside host Jimmy Fallon ahead of the 'SNL50' anniversary special.
The February 10 "Tonight Show Starring Jimmy Fallon" will close with a performance, and there is every reason to believe it ...
Philadelphia Eagles running back Saquon Barkley, Super Bowl MVP Jalen Hurts to be guest on the Tonight Show with Jimmy Fallon ...
Among the laps, Hurts, running back Saquon Barkley, and the entire Eagles starting offensive line found themselves as guests ...
Ahead of this weekend's 50th anniversary "Saturday Night Live" special, Poehler and Fey stopped by "The Tonight Show" to reminisce with Fallon.