Who was literally the first singer to appear on Steve Allen's Tonight Show has evidently been lost to broadcast history but I can find Eydie Gorme & Steve Lawrence appeared in the first year, 1953.
Jason DeRulo
Might have been Jennie Smith.
1962 was the first year Johnny Carson was the host of The Tonight Show.
Jay Leno's first 'last' episode was May 29, 2009, his second and real last episode was February 6, 2014.
Groucho Marx
Jack Parr. He was the inventor of the Tonight show, and was it's first host. xxxxxxxxx Actually, it is Jack Paar (2 A's). And, he was not the first host of the Tonight Show. The first host was Steve Allen. xxx Check your facts Jack Paar was the first, and Steve Allen was the second. xxx According to imdb.com, which is not always correct, Steve Allen hosted Tonight! from 1953 to 1957. Jack Paar hosted The Jack Paar Tonight Show from 1957 to 1962. People are often confused by the fact that Allen hosted The Steve Allen Show (a weekly show) from 1956 to 1960, and The New Steve Allen Show (nightly) from 1961-1964. The New Steve Allen Show had a format similar to The Tonight Show, but was a competing show. NBC had him quit Tonight!, a successful show, so he could focus his energy on the weekly show, which competed with Ed Sullivan.
Joey Bishop
1977
Kendra Foster has: Played Singer in "The Tonight Show with Jay Leno" in 1992. Played Singer in "Total Request Live" in 1998. Played Singer in "The Bernie Mac Show" in 2001. Played Herself - Singer in "The 46th Annual Grammy Awards" in 2004. Played Singer in "25 Strong: The BET Silver Anniversary Special" in 2005.
David Letterman is the first host of the Late Show on CBS. He originated the show in 1993, when he left NBC.
The Tonight Show was created on 1954-09-27.
Anthony west