From Steve Allen to Jimmy Fallon, here are some classic “Tonight Show” moments.
Regis Philbin shows off his Jimmy Fallon impression during 'Tonight Show' thank you notes
Jimmy Fallon and Sam Rockwell did the most awesomely bizarre 'Gong Show' ending on Friday's 'Tonight Show'
Kid letter dares Jimmy Fallon to dance on his desk, so he busts out amazing middle-aged dad dance moves
Jimmy Fallon recruits Ariana Grande, One Direction and Meghan Trainor for post-Super Bowl 'We Are the Champions'