Video has emerged of pop star Justin Bieber singing, “if I kill you… there will be one less lonely n****r” in a racist parody of his 2009 hit One Less Lonely Girl.
The clip comes after Bieber, 20, was forced to apologise after another video emerged of him attempting to make a joke about why black people are afraid of chainsaws in which he also used the n-word.
In the latest clip, posted online by the TMZ website, a young-looking Bieber looks directly into the camera and sings to the sound of laughter: “If I kill you, I’ll be part of the [white supremacist] KKK and there’ll be one less lonely n****r.”
In the previous video, he asked: “Why are black people afraid of chainsaws?” Guessing the punchline, someone off camera said: “Don't even say it. Don't say it.” However Bieber continued saying: “Run n****r, n****r, n****r, n****r, n****r.”
After this clip was made public, he tweeted a statement, saying: “As a kid, I didn’t understand the power of certain words and how they can hurt.
“I thought it was ok to repeat hurtful words and jokes, but didn’t realise at the time that it wasn’t funny and that in fact my actions were continuing the ignorance.”
He said he had “learned from my mistakes” and that “ignorance has no place in our society”.
“I’m very sorry. I take my friendships with people of all cultures very seriously and I apologise for offending or hurting anyone with my childish and inexcusable mistake,” he added. “I was a kid then and I am a man now who knows my responsibility to the world and not to make that mistake again.”
His use of the n-word is the latest in a series of problems for the singer.
In April, he apologised for posting a picture online from a visit to a shrine in Japan which honoured 14 convicted war criminals.
He is due to stand trial in the US next month on charges of driving under the influence, resisting arrest and driving with an expired licence, after a street race incident in Florida in January.
And last year he caused outrage after writing a message in the guestbook of Amsterdam’s Anne Frank House that he hoped the holocaust victim – famed worldwide because of the diary she wrote while in hiding - “would have been a Belieber”, a reference to the name adopted by his fans.