R&B singer Chris Brown sits during a preliminary hearing at a Criminal Court in Los Angeles June 22, 2009. REUTERS/Lori Shepler/Pool

An excerpt of the Chris Brown interview with 20/20 was aired today on Good Morning America where he apologized a second time for assaulting his former girlfriend Rihanna.

I was wrong for what I did, Brown said. And I would definitely say it's not something that I look past or look over. It's something that's really touchy. And like I said, I'm really sorry for what went down and what happened.

Brown when questioned about whether he understood the severity of the incident, he responded saying, Of course, 100 percent.

The complete interview with Chris Brown will air Friday on the ABC network.