Beyonce At Last Neighborhood Ball:Obamas First Dance - In case you were under a rock,Barack Obama became the 44th president today at noon.President and Mrs. Obama shared their “First Dance” as America’s new “First Couple” with Beyonce singing beautifully Etta James classic “At Last” at the Neighborhood Ball, that was held at the Washington Convention Center.All the best Mr President.You can watch the performance,after the jump.