Justin Bieber has been caught up in further controversy about racist language after claims he used the N-word in a video and joked about joining the Klu Klux Klan.
The new clip emerged just a day after the 20-year-old pop star apologised for telling a racist joke in a video filmed when he was 15.
The latest footage, reported by The Sun, is said to show Bieber altering the words to his 2009 single One Less Lonely Girl to insert the N word in the song. He also jokes about becoming a member of white supremacist group the Klu Klux Klan.
Bieber had earlier apologised in a statement, and said he had learned from his mistakes.
He said: "As a kid, I didn't understand the power of certain words and how they can hurt. I thought it was okay 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.
"Thanks to friends and family I learned from my mistakes and grew up and apologised for those wrongs. Now that these mistakes from the past have become public I need to apologise again to all those I have offended. I'm very sorry."
The second video is thought to have been shot around the same time as the first, in 2009, as part of filming for Bieber's documentary Never Say Never, which was released in 2011.
The first video shows Bieber telling a joke about black people that has a racial epithet as the punchline. Before he says it, someone warns him not to - but he says it anyway amid laughter.
The 20-year-old has lurched from one problem to another in recent months.
Last year he upset young fans by appearing on stage late at a UK gig meaning many had to leave just moments after he took to the stage and then got into a scuffle with a photographer outside his London hotel.
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.
In April he apologised for posting a picture online from a visit to a shrine in Japan which honoured 14 convicted war criminals.