GARTH BROOKS wasn't the only person who sang for JAY LENO'S final "Tonight Show" last night.  KIM KARDASHIAN sang for him, too.  Thankfully, it was only for one verse.


Kim was part of an ensemble that sang a specially-tweaked version of "So Long, Farewell" from "The Sound of Music".  Her line was, quote, "So long, farewell, tonight I told my folks. And now, I won't be the butt of Leno's jokes."


Billy CrystalJack BlackCarol BurnettJim ParsonsSheryl Crow and Oprah Winfrey all showed up to add verses, too. 


After Leno's monologue they went to a video of celebrities telling Jay what he can do now that he's retired. 



Those celebrities included PRESIDENT OBAMA, who joked he was making Leno ambassador to Antarctica as payback for all the jokes he's told about him.


Jay didn't break down until the end of the show, when he gave a final speech.  He said, quote, "This has been the greatest 22 years of my life."  He talked about how lucky he was and thanked the audience.  Then he thanked his staff.


He said, quote, "The first year of this show, I lost my mom.  The second year, I lost my dad.  Then my brother died.  After that I was pretty much out of family, and the folks here became my family . . .


"People say to me, 'Why didn't you go to ABC, to Fox?'  I don't know anybody over there.  These are the only people I have ever known."


He finished off with the words that JIMMY FALLON was probably hoping to hear . . . quote, "It really is time to go, hand it off to the next guy.  It really is."  (Check out the whole thing here.)

Then GARTH BROOKS played him out with "Friends in Low Places".


Meanwhile, THE COMPETITION mentioned Jay's retirement.  DAVID LETTERMAN congratulated Jay on his 22-year run, and it was surprisingly sincere and non-sarcastic.  (Here's video.)


CONAN O'BRIEN got a shot in, though.  He said, quote, "NBC has the Olympics.  It’s a big deal.  NBC will finally get to show somebody who's okay with passing the torch."


He added, quote, "I allowed myself one, but it was a good one."


And while JIMMY KIMMEL and Jay haven't exactly been friends recently, Jimmy sent a nice Tweet yesterday.  Quote: "Issues aside, 20 years at #1 is a remarkable achievement.  Congratulations and best wishes to Jay Leno on an incredible run."