Speaking for the first time about their recent make up in an interview with The Mirror Chris apologised for the assault and admitted that winning RiRi back had taken months of "serious making up".
"Sometimes you row, you fight, with the one you love and things get said, stuff spirals," he told the newspaper. "That night was the deepest regret of my life, the biggest mistake. But she loves me - what can I say? I'm forgiven... but, yes, I worked hard for it."
Talking at Elton John's Aids Foundation Oscars fund raising party, the 23-year-old said he'd "grown up" and learned how to deal with fame. "People attack me and criticise me, it happens all the time," he said. "But they don't know me, and they don't know us. It doesn't bother me anymore. Other people can judge us but they don't know anything."
He added, "I've learned a lot since that night and I've grown up. I was very young and I took a lot of stuff, fame, for granted.
"I didn't understand it. The support from those who do know me and the fans, who are incredible, got me through."
Rihanna has also come to Chris' defence, recently telling The Observer, "It's different now. We don't have those types of arguments anymore. He's not the monster everyone thinks. He's a good person.
"He's giving and loving. He's fun to be around and he has a fantastic heart."
When asked whether Chris' public outbursts (he was involved in a glass-throwing fight with Drake and then car park brawl with Frank Ocean last month) proved he hadn't changed she admitted, "I know it comes off like that, and it doesn't help. For a long time he was really angry... there's so many reasons why I ever reconsidered having him in my life.
"He's giving and loving... That's what I love about him - he always makes me laugh." The 25-year-old also admitted she's already thinking about children, saying, "Hell yeah, but I wish I could order them."