Barack Obama's debating skills may currently be under scrutiny, but at least his sense of humor is intact. Among pop stars like Katy Perry and Jennifer Hudson at an L.A. fundraiser Sunday night, the president laughed about his less than stellar performance in last week's debate against Mitt Romney. "Everybody here is incredible professionals. They're such great friends, and they just perform flawlessly night after night," he said. "I can't always say the same." At a later event, Obama joked about the lack of romance on his 20th anniversary with Michelle, which fell on the night of the debate.