vikings were not just war against but also shrewd strangers and people who lived in harmony with nature. singing has been scientifically proven to lift your mood and singing together as a group has been booming for years so in an effort to boost the spirits of moody berliners to musical organizers put together an evening of public singing and it proved to be a great success. here the audience is the star five hundred people belting out a pop classic. the evening at an open air face and it is called sing sing. this song is a lead by chairman i'm not sousa and a company back into pop it's on piano. hot.