Now, long-time friend Floyd Mayweather has come forward to support Bieber, saying the past judgment error is "part of growing up."
"Justin has been nothing but kind to me, my daughters & sons over the years," the boxer tweeted. "We all make mistakes when we are young, it’s part of growing up."
"I am proud of what he’s doing as a 20 year old musician and business man," he added, tweeting out a photo of the duo together.
Bieber himself took responsibility after the offending footage -- reportedly shot as part of his 2011 documentary “Justin Bieber: Never Say Never" -- hit the Web.
“I’m very sorry,” the singer told TMZ. “I take my friendships with people of all cultures very seriously and I apologize for offending or hurting anyone with my childish and inexcusable mistake. I was a kid then and I am a man now who knows my responsibility to the world and to not make that mistake again.”
“As a young man, I didn’t understand the power of certain words and how they can hurt,” he added. “I thought it was ok to repeat hurtful words and jokes, but didn’t realize at the time that it wasn’t funny and that in fact my actions were continuing the ignorance.”