Listen to Happy Xmas (War Is Over) online. Happy Xmas (War Is Over) is an English language song and is sung by Kirsten & Søren, Tommy Seebach, Keld & Hilda and Snapshot. Happy Xmas (War Is Over), from the album 50 Stærke Danske Julehits, was released in the year 2012. The duration of the song is 3:41. Download English songs online from JioSaavn.