David Letterman crashed The Tonight Show on Monday night to reunite with Paul Shaffer and poke fun at Jimmy Fallon.

Drew Barrymore is no stranger to TV. Super Bowl commercials, though? Now that’s a first! On Sunday, February 9, Drew was one of the many A-listers to make their way into Super Bowl commercial stardom.

"Is this the 23rd hour of The Today Show?,” Letterman asked as he wandered onto the stage to greet Jimmy Fallon.

Feb. 11 (UPI) -- David Letterman joined Jimmy Fallon during his monologue on The Tonight Show Monday. "Is this the 23rd hour of the Today show?" asked the former Late Show host, feigning confusion, ...

On Feb. 10, David Letterman stopped by “The Tonight Show Starring Jimmy Fallon” while his former bandleader, Paul Shaffer, ...

David Letterman made a surprise appearance on The Tonight Show, crashing Jimmy Fallon's monologue to tell a few jokes and ...

Feb. 11 (UPI) -- David Letterman joined Jimmy Fallon during his monologue on The Tonight Show Monday. "Is this the 23rd hour of the Today show?" asked the former Late Show host, feigning confusion, ...

It was a night of surprise returns on late-night Monday (February 10), as not only did John Oliver make a surprise appearance ...