Justin Bieber has apologised for his recent spree of embarrassing tabloid headlines during the recording of his Comedy Central Roast.

Bieber said: "I've turned a lot of people off in the last few years.  But I know I can still put out good music and turn everything all around."

"There was really no preparing me for this life. I was thrown into this at 12-years-old," Bieber continued.

"I didn't know what I was getting myself into. There were moments I am proud of. And there are moments I am disappointed with myself for."

He added: "But the things I have done, don't define who I am. I am a kind-hearted person who loves people. And through it all, I have lost some of my best qualities. For that, I'm sorry."

The Comedy Central Roast of Justin Bieber airs on Monday, March 30 in the US, while Comedy Central UK will show the Roast shortly after.

Watch a teaser clip below.