Jay Leno
Longtime host takes over the monologue to help 'injured' Fallon.
Cause that's what a former "Tonight Show" host does?
He didn't hold back when talking about his late-night rival.
WHAT'S HAPPENING
A flight attendant who says she was falsely accused of using her underwear and pantyhose to carry pet rats aboard airplanes has filed suit against Jay Leno over jokes made about her on "The Tonight Show."
