The night after Whitney Houston died, her daughter Bobbi Kristina Brown could not bring herself to sleep in her mother's Atlanta mansion. That all changed the next morning. "I woke up and I heard her say, 'All right, come home now,'" Brown told Oprah Winfrey in a TV special last night. "And when I came back home, I felt humble, I felt okay." The singer's only child, 19, says she's now comforted by the spirit of her mother, who died last month at age 48. "I can hear her voice in spirit talking to me, 'Keep talking to me. I got you,'" says Brown. "She's always with me. I can always feel her. I can always feel her with me. She always asked me,'Do you need me?' And I caught myself, out of nowhere, I didn't even know I said it, I said, 'I'll always need you.