The 19-year-old described her mother as her best friend, sister and confidant. Brown shared the last tender moments she had with her mother, saying the night before Houston died, she slept in her arms all day and night long.
"She's always with me," Brown said. "Her spirit is strong, it's a strong spirit. I feel her pass through me all the time."
Brown's interview aired Sunday on Winfrey's OWN network in a TV special that also featured Pat Houston, the singer's manager and sister-in-law, and Gary Houston, the brother of Whitney Houston.
It was recently revealed that Houston's will leaves everything to Brown, who was her only child. Brown told Winfrey she plans to follow in her mother's footsteps by singing, acting and dancing.
Houston died Feb. 11 in a Beverly Hills hotel room. She was 48 years old. The cause of her death remains under investigation.
Pat Houston said in the days before Whitney Houston died, the singer had not been abusing drugs, despite reports that she had been acting erratically.
On the day of the singer's death, Pat Houston said she heard screaming as she headed down the hallway toward Whitney Houston's room. When she arrived, she saw the singer's security guard frantically trying to revive her ahead of the paramedics. He told her: "I tried."
Winfrey's interviews also touched on Bobbi Kristina Brown's father, Bobby Brown. Some people have put the blame on Bobby Brown for Whitney Houston's reported drug use. Pat Houston said that was untrue. She and Gary Houston had warm words about him. They also denied that the Houston family had asked Brown to leave the singer's funeral service or didn't want him to come.
The Associated Press contributed to this report.