Aaron Carter has alleged Michael Jackson did "one thing that was a little bit inappropriate".
The 'I Want Candy' hitmaker recently vowed to tell his story about the late King of Pop - who passed away in 2009 - after he was accused by Wade Robson and James Safechuck in the HBO documentary 'Leaving Neverland' of sexual abuse after he befriended them both as children.
And in a clip for an upcoming episode of 'Marriage Boot Camp: Reality Stars Family Edition', the 31-year-old singer can be heard initially defending the 'Thriller' hitmaker by claiming he was "a really good guy", before alleging there was one time where he acted inappropriately.
He says in interview footage from the WE series which was obtained by People magazine: "Michael was a really good guy, as far as I know, a really good guy. He never did anything that was inappropriate. Except for one time. There was one thing that he did that was a little bit inappropriate."
Aaron doesn't elaborate further on his allegations, and hasn't stated whether his claims relate to an act he witnessed, or if the alleged "inappropriate" behaviour was directed toward him.