I am a changed man now: Chris Brown

London: Rapper Chris Brown says he worked hard to prove he has become a better man before winning ex-girlfriend Rihanna back.

The singer made headlines in 2009 when he brutally assaulted the pop beauty during a bust-up a crime he is still on probation for.

The couple reunited recently, and Brown says he spent years showing Rihanna how remorseful he felt about his past behaviour, reported Sun Online.

"It`s all about my responsibility. I just tried my best to be the best man I could over the years and just show her how remorseful and sorry I was for the incident and that time was probably the worst part of my life and, being that she has and is a wonderful person, I`m eternally grateful and thankful," he said.

Brown accepts their reunion has raised eyebrows among many who don`t think he deserves a second chance, but he insists he is a changed man.

"People are entitled to their opinions. I can`t go around blaming. It`s all about my responsibility and me growing up as a man. I think now that I`m becoming older, and trying to mature in this life under the public eye at all times, I have to focus on doing the right thing and being more of a humble individual.

"And I`m not just saying fame or stardom because that`s not what it`s about. I`m talking about dignity and integrity. You know, you lose yourself in a way. So that process of me having to deal with any trials and tribulations I went through at that time, it was a learning step for me," he said.