First lady Michelle Obama and daughters Sasha and Malia attended one of Beyonce\'s first shows since she gave birth, concert-goers in Atlantic City, N.J., said. Obama received a thunderous round of applause from the crowd at Beyonce\'s second sold-out show Saturday at Revel\'s Ovation Hall, the Press of Atlantic City reported. The series of four concerts marking the grand opening of the resort are the only announced performances for Beyonce for the year, which may explain why the Obamas made the trip to Atlantic City, the newspaper said. New Jersey Gov. Chris Christie and his family were also in attendance for the performance, along with actress Maria Bello, models Janeil Williams and Emily DiDonato, and Baltimore Ravens running back Ray Rice. Tickets for the first three shows sold out within the first minute of going on sale, so the resort added a fourth concert, Revel representatives said.