Combo photo taken on April 22, 2012 shows France's President and Union for a Popular Movement (UMP) party's candidate Nicolas Sarkozy's wife Carla Bruni(L) and France's Socialist Party candidate Francois Hollande's companion Valerie Trierweiler. French incumbent President Nicolas Sarkozy, representing the Union for a Popular Movement (UMP) and his socialist challenger Francois Hollande topped out in Sunday's first round of presidential election, entering the run-off to be held on May 6. (Xinhua)