Chris Brown, Rihanna

In the conclusion of her interview with Diane Sawyer, Rihanna said Chris Brown "had no soul in his eyes" during their altercation last February, a moment Brown said should remain a "private matter."

Rihanna said during the altercation, Brown was "clearly blacked-out. There was no person when I looked at him. It was almost like he had nothing to lose."

The final part of Rihanna's interview aired on 20/20 Friday, and the R&B songstress went into new detail about the incident. She said it started when Brown received a text message from another woman. "I caught him in a lie," she told Sawyer. "I wouldn't drop it, and he couldn't take that."

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Rihanna discussed her personal battle after the fight — and a police photo of her battered face — went public. "I get very ashamed, angry... embarrassed," she said. "You start lying to yourself, blaming yourself.... I didn't want people looking at me. I felt really lonely."

The revealing interview was a ratings hit for 20/20, which nabbed a season-high 8.2 million viewers for the show and a 2.7 rating in the adults 18-49 demographic. The numbers were the best the news program has posted in the past three years.

She said her relationship with Brown, which she called dangerous and said was "a bit of an obsession," has experienced the most damage. "He'd say, 'You hate me, don't you?' and I would lie and say, 'No,'" she said. "I don't know if he understood the extent of what he did."

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Brown said in an interview with MTV News Friday that he wants to move past that moment in his life. "I've come to terms with it and I'm working on it," Brown said. "For that moment or whatever had me at that place, I want to erase that from what my character is. I want to be totally different from now on. I don't want to be that person."

Brown called Rihanna a "close friend" and talked about going public with his apology regarding the incident. "When I apologize, I really apologize," Brown said. "We've exchanged, I've exchanged my apologies for her, but when I do it publicly, it's for who I've let down. It's for the fans, it's for all the people, even the sponsors."

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Brown did not discuss the specifics of the incident in his sit-down with MTV, and released a statement regarding Rihanna's ABC News interview.

"While I respect Rihanna's right to discuss the specific events of February 8, I maintain my position that all of the details should remain a private matter between us," he said in the statement. "I do appreciate her support and wish her the best. I am extremely sorry for what I did, and I accept accountability for my actions."