LOS ANGELES , California -LRB- CNN -RRB- -- Singer Chris Brown publicly apologized for assaulting his pop star girlfriend , Rihanna , in a video statement posted on his personal Web site Monday . Chris Brown , shown here at his June 22 court appearance , has publicly apologized in a video posted Monday . `` I have told Rihanna countless times , and I 'm telling you today , that I 'm truly , truly sorry in that I was n't able to handle the situation both differently and better , '' Brown said . `` What I did was unacceptable , 100 percent . I can only ask and pray that you forgive me . Please . '' Brown , 20 , was arrested after an early morning argument inside a rented Lamborghini on a Hollywood street in February . He admitted guilt to a felony assault charge in June in a plea deal under which he will serve five years of probation and do about 1,400 hours of `` labor-oriented service . '' Sentencing is set for August 5 . A publicist for Rihanna , whose real name is Robyn Rihanna Fenty , has not responded to CNN requests for comment on the apology . Watch Brown ask for forgiveness '' Brown , in the two-minute video , said he had wanted to `` publicly express my deepest regret and accept full responsibility '' since February , but he remained silent on the advice of his defense lawyer . `` Although I will do some interviews and answer some questions in the future , I felt it was time you heard directly from me that I am sorry , '' he said . `` I have tried to live my life in a way which can make those around me proud of me , and until recently , I think I was doing a pretty good job , '' Brown said . `` I wish I had the chance to relive those few moments again , but unfortunately I ca n't . I can not go into what happened , and most importantly , I 'm not going to sit here and make any excuses . '' The incident began when Rihanna , who was riding in the sports car driven by Brown , found a text message on his cell phone from `` a woman who Brown had a previous sexual relationship with , '' according to a sworn statement by Los Angeles Police Detective DeShon Andrews . `` A verbal argument ensued , '' followed by the physical attack , the statement said . It went on to describe the assault in great detail , saying Brown punched Rihanna numerous times and put her in a headlock , restricting her breathing and causing her to start to lose consciousness . He threatened to beat her and kill her , according to the statement , and he bit her ear and her fingers . Eventually , `` Robyn F. began screaming for help and Brown exited the vehicle and walked away , '' the statement said . `` A resident in the neighborhood heard Robyn F. 's plea for help and called 911 , causing a police response . An investigation was conducted and Robyn F. was issued a Domestic Violence Emergency Protective Order . '' At the end of his statement , the detective said Brown sent a text message nine days later , apologizing . `` I take great pride in me being able to exercise self-control , and what I did was inexcusable , '' Brown said in his video apology . `` I am very sad and very ashamed of what I 've done . My mother and my spiritual teachers have taught me way better than that . '' Brown , who lost several product endorsements after his arrest , said he realizes he has `` truly been blessed '' and he intends `` to live my life so that I am truly worthy of the term ` role model . ' '' `` As many of you know , I grew up in a home where there was domestic violence , and I saw firsthand what uncontrolled rage can do , '' he said . `` I have sought and I am continuing to seek help to ensure that what occurred in February can never happen again . And as I sit here today , I can tell you that I will do everything in my power to make sure that it never happens again . And I promise that . '' His probation requires that Brown complete domestic violence counseling . The judge said he can not have contact with Rihanna again until that is completed .