Stevie Wonder has attacked Eminem for ridiculing Michael Jackson in his video for Just Lose It.
Wonder said the white rapper was a hypocrite because he owed his success to poor and black people.
Jackson has already attacked the video, which shows him on a bed with a group of children.
The self-styled King of Pop is facing child molestation charges.
Wonder told Billboard magazine he was "really disappointed" in Eminem.
He told the trade magazine: "Kicking someone when he's down is not a good thing.
"I have much respect for his work, though I don't think he's as good as the late rapper 2Pac. But I was disappointed that he would let himself go to such a level."
The musician added: "He has succeeded on the backs of people predominantly in that lower pay bracket, people of colour.
"So for him to come out like that is bull."
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