Jimmy Fallon made his debut on The Tonight Show on Monday, February 17, 2014. Here is a lineup of his guests for the first 10 shows:
Monday, Feb. 17: Will Smith and U2
Tuesday, Feb. 18: Jerry Seinfeld, Kristen Wiig, and Lady Gaga
Wednesday, Feb. 19: Bradley Cooper and Tim McGraw
Thursday, Feb. 20: First Lady Michelle Obama, Will Ferrell, and Arcade Fire
Friday, Feb. 21: Justin Timberlake
Monday, Feb. 24: Reese Witherspoon, Fred Armisen, and Rick Ross with The Roots
Tuesday, Feb. 25: Paul Rudd and Shaquille O'Neal
Wednesday, Feb. 26: Drew Barrymore and Adam Sandler (appearing together), and Dierks Bentley
Thursday, Feb. 27: Denzel Washington
Friday, Feb. 28: Cameron Diaz and Mike Tyson
I can't find anyone who has been famous long enough & lived long enough to appear on The Tonight Show with all five hosts.
Comedians like Don Rickles & Bob Newhart have come the closest with 4 hosts each, interestingly enough Don evidently appeared on The Tonight Show in the time between the hosting stints of Jack Paar & Johnny Carson.
Robin Williams and Bette Middler were the guests on the final episode of the Tonight Show, with Bette Midler as the final guest, singing two songs.
If we assume two or three guests an episode, including musical acts, there has literally been tens of thousands of guests on The Tonight Show since its debut in 1953.
This question was originally written on August 25th 2009 & the guests on The Tonight Show with Conan O'Brien were Quentin Tarantino, Mark Feuerstein & musical guest Smokey Robinson
May 29th 2009 was Jay Leno's first 'last' episode before he left TTS the first time, the guests were Conan O'Brien & James Taylor.
There wasn't a new episode on that night.
Showbiz Tonight - 2005 2010-04-23 was released on: USA: 23 April 2010
TV Talk Tonight with Steven Brandon - 2010 was released on: USA: 5 April 2010 (internet)
Today, April 16th, 2010. It was quite entertaining.
The Tonight Show with Jay Leno - 1992 18-32 was released on: USA: 14 April 2010 USA: 14 April 2010
The Tonight Show with Jay Leno - 1992 18-30 was released on: USA: 12 April 2010 USA: 12 April 2010
It is always celebrated on April 16th.
it erupted on the 16th of April 2010
Showbiz Tonight - 2005 2010-04-23 was released on: USA: 23 April 2010
Showbiz Tonight - 2005 2010-04-28 was released on: USA: 28 April 2010
Entertainment Tonight - 1981 2010-04-01 was released on: USA: 1 April 2010
Entertainment Tonight - 1981 2010-04-02 was released on: USA: 2 April 2010
Entertainment Tonight - 1981 2010-04-03 was released on: USA: 3 April 2010
Entertainment Tonight - 1981 2010-04-05 was released on: USA: 5 April 2010
Entertainment Tonight - 1981 2010-04-06 was released on: USA: 6 April 2010
Entertainment Tonight - 1981 2010-04-07 was released on: USA: 7 April 2010
Entertainment Tonight - 1981 2010-04-08 was released on: USA: 8 April 2010
Entertainment Tonight - 1981 2010-04-09 was released on: USA: 9 April 2010