This was an American fight song during World War I written by Irving Berlin. It was used in a number of USMNT adverts leading up to South Africa 2010
Over There, Over There Send the word, send the word, Over there, That the Yanks are coming, The Yanks are coming, The drums rum-tuming everywhere, So prepare, say a prayer, Send the word, send the word, To beware, We'll be over, we're coming over, And we won't be back til it's over, Over there!
Originally written in 1918 - very patriotic song by Irving Berlin. He came up with it whilst serving in the army in New York