When you buy through links on our articles, Future and its syndication partners may earn a commission. Launching his current YouTube channel in 2009 at the age of 16, KSI - real name Olajide Olayinka ...

The singer shocked the judges and audience on Saturday (19 April) as he emerged from the crowd and begged Simon Cowell to let him audition. He then went on to perform a rendition of Frank Sinatra's ...