Just days ago pop superstar Justin Bieber took to Twitter to apologize to his fans after a video surfaced of the singer going off on a racist rant at 15 years of age. New allegations arose on Wednesday with news of another video clip that shows Bieber reportedly rapping about joining the Ku Klux Klan (KKK) and "killing n****s."

A news outlet in England called The Sun has alleged to have gotten its hands on a 24-second video clip that again reveals Bieber's reported racist streak. The Sun claims that the clip shows him "changing the lyrics of his song 'One Less Lonely Girl' to crack a vile joke about killing black people."

Exposé Entertainment reports that it's been claimed that Bieber altered the track by retitling it "One Less Lonely N****" and is seen in the video laughing as he alludes to joining the KKK.

"Unfortunately this is the devastating reality of how Justin has behaved and reveals his attitude toward such a deeply emotive subject," a source reportedly told The Sun.

The British newspaper says that it is unclear exactly when this newly surfaced video was filmed but is alleged to have been at some point after Bieber signed on with the Raymond Braun Media Group "and was a rising child star."

This news comes on the heels of headlines made this past Sunday about an earlier video in which a 15-year-old Bieber was seen telling a racist joke.

In response to the public outcry over his intolerant behavior as a teen, Bieber issued a public apology on Twitter. The singer told his fans that he was sorry for offending or hurting anyone with his "childish and inexcusable mistake."

In that apology Bieber reiterated that he was "a kid then" and is "a man now who knows my responsibility to the world and to not make that mistake again."

Do you know your responsibility now, Justin? Do you? That's all that can be said in light of these new allegations of the bad boy pop star setting yet another bad example for the masses of "Beliebers" (read: rabid fans) and haters alike just waiting to see what this young man does next.

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For the latest news & updates, follow reporter Bary Alyssa Johnson on Twitter: @MissBary