For the first time in months, there was positive news about the future of Beyonce and Jay Z's relationship over the weekend. Bey and Jay attended a party thrown by the rapper's mother, and witnesses say they laughed, shared a bottle of champagne, and seemed to be enjoying each other's company. It seems today that the Carter's happiness was short-lived, however, as audience members at their Sunday night concert in L.A. claim that Beyonce broke down in tears while performing "Resentment" - a song about a cheating spouse. Those in attendance say prior to the revenge ballad, Bey appeared to be depressed and distracted: She looked like she had been crying from the time the concert began," says one concertgoer. "Her eyes were really glassy and red and it looked like she was just going through the motions on stage." "When she finally sat down to sing 'Resentment,' she looked like she was ready to let it out. She was ...