Chris Brown 'disappointed' in his behavior

Chris Brown has apologized for his destructive tantrum at "Good Morning America" earlier this week. The 21-year-old singer says he needed to let out his anger after being asked about his attack on Rihanna.

ABC News said Brown smashed a window in his dressing room after his interview with "GMA" co-host Robin Roberts on Tuesday. Roberts had asked Brown about the beating two years ago of his then-girlfriend. He's still on probation for that attack.

During an appearance Wednesday on BET's "106 & Park," Brown said he was under the impression that the interview would only focus on his new album, "F.A.M.E."

Brown apologized, saying he was disappointed by his actions, but said he needed to let off steam. He also noted that he didn't physically harm anyone.