Jimmy Fallon, Jay Leno: The 'Tonight' duet

Jimmy Fallon and Jay Leno at the 70th Annual Golden... — Jimmy Fallon and Jay Leno at the 70th Annual Golden Globe Awards in Beverly Hills, Calif. in January. The two late-night talk show hosts spoofed rumors of Fallon taking over Leno's show. (Jan. 13, 2013) Credit: Getty Images

By Verne GayApril 2, 2013

Jay Leno and Jimmy Fallon ... Just late night rivals ... or lovers? The intriguing possibility was raised Monday night in this duet, sung to "Tonight," at the beginning of "Late Night with Jimmy Fallon:" (And yes, of course I reviewed this! Go here for that...)

"Why do they say we fight, I like you, you like me ... we're OK ... "

Check it out -- it's good and this could the beginning of a beautiful new relationship ...