Olajide William 'JJ' Olatunji, known publicly as KSI, is one of YouTube's biggest stars, chart topping music artist, and a professional boxer with a combined social media reach of over 39.46 MILLION.
YouTubers take over a sold-out Wembley Stadium on Saturday afternoon, as the 2025 Sidemen Charity Match kicks off featuring a number of the world's biggest content creators – but who are the Sidemen?
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