Bon Jovi was the other big guest, and he came through as well for Fallon. During Bon Jovi's segment, an audience member was brought onstage to do a karaoke version of his song, "Wanted Dead or Alive." When the young woman finished singing, Bon Jovi left his seat, got up and sang a chorus with her. And all of this came with the Roots houseband, the best musical group on latenight TV, playing behind them. For a moment, performer, audience and viewer all seemed to be riding the same current of energy and fun -- the stuff of which latenight talk-show success is made.