Instagram/REN DMC & KSI Celebrity KSI gets brutally roasted by battle rapper REN DMC on Britain's Got Talent. Watch the viral clash over his music and boxing career. April 13, 2026 AceShowbiz - KSI faced a harsh verbal onslaught from battle rapper REN DMC during a recent episode of Britain's Got Talent, creating a viral moment that quickly divided fans online. The intense exchange began as soon as REN DMC took the stage, armed with sharp bars aimed squarely at the show's judges. However, it was his pointed attack on KSI's music and boxing career that drew the most attention.