Pop sensation Justin Bieber says he is "disappointed" in himself for his bad boy behaviour.
Bieber, 21, said his mother is the person who kept him from lingering in his "stupid phase", reported MTV online.
"I was rebelling a little bit. I was getting cockier and cockier. I didn't have people to check me," Bieber said.
"I looked back and I was disappointed in myself. You have to own up to the mistakes. You have to say, 'I'm sorry if I've let you down'. I always want to be honest and let people know that those mistakes aren't who I am. Who I am is someone who really cares about people," he added.
