Akon Bieber's a Grown Man He Makes His Own Weed Decisions

10/3/2015 6:24 AM PDT

Akon -- Justin Bieber's a Grown Man ... He Makes His Own Weed Decisions (VIDEO)

EXCLUSIVE

Akon is scoffing at the notion Justin Bieber chugged booze an very possibly smoke a joint onstage this week because of a dare.

As we reported, Justin chugged from a Hennessy bottle and grabbed a blunt during a performance with Rae Sremmurd in New Zealand.  We're told Bieber claimed to have done it on a dare.

But Akon, who's friends with the Biebs, told us on his way out of Fleming's Steakhouse in Bev Hills, "dares" don't count for grown-ass men.