A few weeks ago Jimmy Fallon wrote a song that he thought would be perfect for Rod Stewart and the NBC host made a viral video asking the crooner if he would sing it with him on Late Night when he was guest on the show. Well the ageless singer was on the show last night and he did the duet with Fallon. Once you hear Rod’s velvety voice on the tune, you realize that Dancin’ With You All Night Long is perfect for him. I just wish we would have heard Stewart sing a verse or two of it instead of just back up vocals.