Oprah: Why haven't you ever invited me on your show?
Jon: I invited you. I sent you notes. ... Want to come on my show?
Oprah: Yeah, I really would.
Jon: Seriously? Then it's done. ... Let me ask you a question. Will Travolta fly you there? And where are you going to take my audience?
Don't know what Jon's joking about? Relive the show-stopping surprises in Oprah's 25th season premiere!