Fifty-one Nifty-one United States?

Guy: Miss Puerto Rico won the Miss Universe pageant, huh?
Girl: Oh, so the US won.
Guy: No, Puerto Rico won. The US had its own entrant.
Girl: Wait, I thought Puerto Rico was a state.
Guy: You're joking right?
Girl: Do I sound like I'm joking? Seriously though, it's not?

-- McPherson Square