Famous people ancestry. President Obama retraced some of his lesser-known ancestral roots to a village in Ireland. One of the president's maternal great-great-great-grandfathers was a shoemaker who immigrated to the United States during the height of a crisis in his homeland. Crowds packed the streets to hear Obama speak as he kicked off a four-nation tour of Europe

 The new season of this international hit show launches March 21. The incoming cast includes a pro wrestler, a former child star and a media maven. Before the latest competitors sweep you off your feet, check in with past winners.