The song was half way through when Jack had begun cheering for Arwen as things started kicking, Leaning in to hear the Doctor, Jack managed to hear his question before answering. "Yeah. I think after this, Arwen will only want to watch and see us both try our time with this game." he told the Time Lord, continuing to watch Arwen play. 
With the song over, Arwen had finished beautifully while the guy thought to have won. Sorely mistaken, Arwen had won with far more points than him. Holding out her hand to him , the guy looked at her smuggly and angry with his loss that she had watched him walk away like he was having a tantrum. Looking over to the crowd before her, she saw them all cheering as was Jack. Grabbing her jacket, she got off the platform. With the crowd dispersing, she looked to the Immortal and the Doctor, looking a little worn out. Harkness pulled her into a big hug. "congrats. I knew you could do it." Jack told her before letting go.