. . . . . . . . . . . . . "I do not know what happened that day, Patricia Houston said in a recent interview with Oprah Winfrey.Houston, 48, was buried in a New Jersey cemetery next to her father after an emotional four-hour funeral service that was attended by friends, family and superstars such as Oprah Winfrey, Tyler Perry, Alicia Keys, Mariah Carey, Mary J. Blige, Jennifer Hudson and Roberta FlackHouston, a sensatio" . . . .