The pop star, 24, finally comes clean about why she decided to get back with the singer, 23, who was charged with assaulting her in 2009, in the latest Rolling Stone cover story.
"I decided it was more important for me to be happy and I wasn't going to let anybody's opinion get in the way of that," she tells the magazine, which has an excerpt of the story available here. (The issue is on newsstands nationwide Friday.)
"Even if it's a mistake, it's my mistake," she says. "After being tormented for so many years, being angry and dark, I'd rather just live my truth and take the backlash. I can handle it."
The singer, who has released new duets with Brown including "Nobody's Business" from her last album Unapologetic, understands the world may harbor negative views towards her and Brown's rekindled relationship. But she says things have changed between the two of them.
"When you add up the pieces from the outside, it's not the cutest puzzle in the world. ... But it's different now. We don't have those types of arguments anymore," she says. "We value each other. We know exactly what we have now, and we don't want to lose that."