Rihanna’s life changed forever on that fateful night in February 2009. In the latest preview from her candid interview with Oprah, the pop star shares some new revelations and explains why she was concerned for her ex-boyfriend.

An emotional Rihanna fought back tears while recalling her breakup with Chris Brown. “I lost my best friend,” she told Oprah during her visit to Barbados to tape “Oprah’s Next Chapter.” “Like everything I knew was switched. Switched in a night. And I couldn’t control that. So I had to deal with that, and that’s not easy for me to understand or interpret. And it’s not easy to interpret on camera, not with the world watching.”

While she was portrayed as the victim, she felt bad for Chris. “I felt protective,” said the “We Found Love” singer. “I felt like the only person they hate right now is him. It was a weird, confusing space to be in because as angry as I was, as angry and hurt and betrayed, I just felt like he made that mistake because he needed help, and who’s gonna help him? Nobody’s gonna say he needs help. Everybody’s gonna say he’s a monster without looking at the source. I was more concerned about him.”

Rihanna’s full conversation with Oprah will air Sunday at 9 p.m. EST on OWN.