Pop star Justin Bieber has issued a new apology following the release of a second racist video he shot while in his midteens.

"Facing my mistakes from years ago has been one of the hardest things I've ever dealt with," Bieber, 20, said in a statement provided to Newsday. "But I feel now that I need to take responsibility for those mistakes and not let them linger. I just hope that the next 14-year-old kid who doesn't understand the power of these words does not make the same mistakes I made years ago. At the end of the day I just need to step up and own what I did."

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The six-year-old video, the second such released within a week, shows Bieber singing a parody of his own "One Less Lonely Girl," but with the word "girl" replaced by a racial slur. He also jokes about killing black people and joining the Ku Klux Klan. The Canadian singer already apologized on Sunday for a five-year-old video in which he told a racist joke involving African-Americans.

Along with his second apology, Bieber posted an Instagram image of a page containing biblical quotations from a book identified by The Christian Post as Sarah Young's "Jesus Calling: Enjoying Peace in His Presence."

Bieber's longtime manager, Scooter Braun, posted his own note on Instagram, writing, "Some mistakes have no excuses. They are just wrong. But how a man reacts to those mistakes . . . How he owns it and learns from it . . . That defines him more than the mistake itself."