The Insurrectionary People's Picture Show Theater

According to the Wikipedia entry, "This song chronicles the Easter Uprising of 1916, and encourages Irishmen to fight for the cause of Ireland, rather than for the British, as so many young men were doing in World War I." The wiki entry also very helpfully links many of this historical and geographical references in the song, so check it out.

Sinéad O'Connor is best known in North America for the hit Nothing Compares 2 U. After she tore up a picture of the pope on SNL, she fell off the North American map. Few people here would know that she went on to have a very successful reggae career, as well as continuing anti-catholic activism.