Justin Bieber has made a swift apology following the leak of a sensational video which showed him telling a vile racist joke at age 15.

The pop brat, 20, said late Sunday he’d make the comment as a “kid” — a time when he “didn't understand the power of certain words and how they can hurt.”

"Five years ago I made a reckless and immature mistake and i'm grateful to those close to me who helped me learn those lessons as a young man,” the “Boyfriend” singer told Breaking Celebrity News in a statement.

As Breaking Celebrity News previously reported, Bieber was caught red-handed on video telling the tasteless joke to pals.

“Why are black people afraid of chainsaws?” he asks an unidentified female friend in the tape, belie