Would anybody–anybody–have predicted fun.’s lead single “We Are Young” making the TV-performance rounds a year or so ago? (Assume, for this, that it existed a year or so ago.) Probably not, and yet here we are, watching “We Are Young” talked up by Letterman and done live. There’s no Janelle Monae here but then again, there wasn’t much of her on the track proper. (Backing vocals should not be featured credits. Again.) It translates, though, theatrical on the verses and booming on the chorus as it should be. We’re perfectly fine watching a lot more performances of it. Let’s see it happen.