Chris Brown and his mother, Joyce Hawkins enters Los Angeles Superior Court on April 6, 2009 in Los Angeles, California.

The singer, 19, entered a not guilty plea on both of his felony charges of assault and making criminal threats to Rihanna, 21, at Monday's arraignment.

"I don't want his career to be damaged -- it’s damaged already," Fenty told Us Monday. "I think he’s a talented guy, but everybody should have to pay. When you do the crime, you do the time. I don't want to see him locked up for a long time -- I just want him to acknowledge and get some help."

If Brown claims to be not guilty, Fenty wants to know who is responsible.

Source: USMagazine