"I was rebelling a little bit," Bieber tells the magazine in the issue that hits newsstands May 19. "I was getting cockier and cockier. I didn't have people to check me."
He goes on, "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.'"
Justin Bieber Explains How Skrillex & Diplo Added to a Song He Was Writing for Piano
Bieber has recently been running the gauntlet to redefine himself on what some are calling an "apology tour." This has included a Comedy Central roast, public acknowledgement on The Ellen DeGeneres Show that he's done "some things that might not of been the greatest" and a continuous pushing the point with press that he's no longer a bratty boy but now a changed man.
"I always want to be honest and let people know that those mistakes aren't who I am," he told Seventeen. "Who I am is someone who really cares about people."