Whitney Houston's daughter opens up to Oprah

'I'm doing good," she says, as good as she possibly can.

And so, Bobbi Kristina Brown, 19, the daughter of Whitney Houston, finally spoke Sunday night -- for the first time, publicly, in a much-promoted interview on OWN, a network in need of a big scoop. And a network that got one: a powerful and moving one, too.

Brown, who has effectively been invisible since the death of her mother on Feb. 11, spoke with Oprah Winfrey about her mother and "best friend . . . I gotta carry on her legacy."

Brown told Winfrey that she wants to sing and "do acting, dancing. It's a lot of pressure, but she prepared me for it."

And this, to the question of whether she believes her mom is really gone: "It's so surreal. I still walk in the house . . . Mom. I've accepted. I have accepted."

The last day? "The very last day, it was so early in the morning. Went to go get her. 'Mom, can you lay with me?' She laid with me all night and all day. She was holding me.

"So many people . . . they don't know who she really was. Everything people were saying about her -- all that negativity is garbage. That's not my mother."

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Winfrey did not ask about drug abuse, or when Brown learned of her mother's death -- Brown was hospitalized briefly afterward, according to reports.

Houston's sister-in-law and manager, Patricia Houston, spoke about the moment she came into the hotel room: She saw Houston's bodyguard Ray Watson "trying to revive her, to the point of exhaustion." She said then, " 'Ray, let it go.' He was on his knees. He was so out of breath. I felt so badly for him."

Houston's brother Gary said, "I never thought anything like this would happen." Of their mother, Emily "Cissy" Houston, he said, "She lost her only daughter. It's rough for her."

Houston was found unconscious in a hotel bathtub. A toxicology report is expected around March 23.