Olajide Olayinka Williams ''JJ" Olatunji born 19 June 1993, better known as KSI, is an English YouTuber, internet personality, rapper, actor, and boxer. He is also a member and co-founder of the British YouTube group known as the Sidemen. We have covered KSI so much on this channel. He is one of our favorite YouTubers and he just released a new rap album, so it's time for an update and a listen.