Goodbye, stranger! I wonder when we'll see Jay Leno on late night again? Oh, right... he's going back to The Tonight Show on March 1st. Ha.

Leno ended his five-month run on primetime last night - The Jay Leno Show is officially dunzo.

Jokingly, he asked the packed studio audience, "Where were you the last five months? That's what I want to know!" And when talking about what has changed during his primetime run, he merely said, "Heidi Montag." Okay, that was funny!

Check out a cute moment from the show above when the TV host got punk'd, sorta, by Ashton!