The star worked with Brown on the track One Night Stand from her new album No Boys Allowed.
Brown recently finished a year-long domestic violence course and Hilson said fans have started forgiving him already.
She said to MTV News: 'People are already putting [Brown] back in their good graces 'cause they see his remorse. And I know people are saying: 'Is he really a man? You have him on your album.'
'I mean, yeah. To me, a man is someone, you don't go back in life. You learn from your mistakes, and you don't do it again. You show remorse, and you move on. You move forward onto bigger and better things. That's a man trait.'