Cardi B Appears to Diss Stefon Diggs at Concert, ‘Who You Playin’ With Mothaf***a?’

Cardi B might’ve backed Stefon Diggs after BIA’s diss, but don’t get it twisted … she’s still big mad at the NFL star, and she proved it at her latest concert, throwing major shade at her ex! The “Imaginary Playerz” rapper was onstage during her…