The singer 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 sensation from her first, eponymous album in 1985, was one of the world???s best-selling artists from the mid-1980s