Chris Brown considered killing himself after assaulting ex-girlfriend Rihanna.

The Yeah 3x hitmaker admitted he felt “like a monster” after he attacked the superstar during a blazing row in February 2009 after a pre-Grammys party.

In a trailer for Chris’ upcoming documentary, Welcome to My Life, he spoke about becoming “public enemy number one” and that he “felt like a f***ing monster”.

“I was thinking about suicide and everything else,” he said. “I wasn’t sleeping. I wasn’t eating. I just was getting high.”

And the 26-year-old star’s mother, Joyce Hawkins, admitted the incident really affected their family after the news went public and the world saw a photograph of Rihanna’s battered face.

“That was the worst day of my life and probably his life,” she said in the two-minute preview for he documentary. “I felt like I was going to lose my child.”

Despite the way his reputation plummeted after the assault – for which he was sentenced to five years of probation, one year of domestic violence counselling, and six months of community service - and subsequent other legal problems, the singer insists he will never be “finished”.

As the trailer draws to a close, he said: “If there was ever a doubt in your mind that Chris Brown was done, he was finished? I wouldn’t bet on it.”

A release date has yet to be set for the documentary, which features contributions from the likes of Jamie Foxx, Usher, Jennifer Lopez and Mary J. Blige.

•Adapted from a Daily Mirror report. Photo shows Chris Brown.