A second video of Justin Bieber making racist jokes and using the N-word has surfaced, according to a report.

In the newly revealed but ­undated video clip, the troubled 20-year-old pop star spouts the racial slur in a song lyric, and makes a joke about joining the Ku Klux Klan, according to Britain’s Sun newspaper.

In his 2009 hit song “One Less Lonely Girl,” he alters a lyric and sings “One Less Lonely ­N—-r,” the paper said.

Bieber was forced to apologize Sunday when a video of him making a racist joke was leaked.

That video was made when the then-17-year-old was filming a documentary.