Jay Leno and Jimmy Fallon have had it up to here with hearsay about the Tonight Show's future, and they're doing something about it: singing. The two hosts launched into a version of "Tonight, Tonight" from West Side Story last night, reflecting on what's next for the show, Entertainment Tonight reports. "Tonight, tonight. Why do they say we fight? I like you. You like me. We're OK," they sang. "Tonight, tonight, who cares who hosts Tonight? People just watch online the next day."