Justin Bieber Is 'Passionate About Being Better'

— -- Justin Bieber knows he's made mistakes in the past few years -- and now he's trying to make amends.

The singer appeared on "The Ellen DeGeneres Show" to explain why he made a mea culpa over Facebook after appearing on her show earlier this year.

"It was the first time I was on television for a long time and I just was worried about what people were thinking about me," he said. "Like I said last time, I did a lot of things over the past few years that I'm not proud of but yeah, i was just nervous to be in front of people again."

Bieber, 20, admitted that he's been hurt by the things he's read about himself online. Reminding viewers that he's human, he opened up about what's next.

"I just gotta be strong enough to keep pushing, but that's why I just wanted to make the video to just let people know that I'm human, I love people, I love love," he said. "I'm passionate about being better and growing, so I think this is gonna be an wesome chapter in my life and I'm so glad to have you guys supporting me."