Bieber has been at the centre of controversy recently after TMZ obtained pictures which showed him apparently smoking a joint at a party.
Akon has now told TMZ that he hadn't heard the reports but will confront the 'Boyfriend' singer about them.
"I gotta talk to Justin," he said. "I didn't know he was smoking either. That's my little man, just really. I'll talk to him. Hopefully, I'll make an impact."
Akon described Bieber as a "responsible kid" but added that he should stop smoking, saying: "If he won't do it for himself, do it for the fans."
Reports have suggested that rapper Lil Twist has had a negative impact on Bieber, while other rumours alleged that his ex-girlfriend Selena Gomez has vowed not to reunite with him as he is a "bad influence".
Watch Akon talking about Justin Bieber below:
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