Olajide Olayinka Williams, better known by his YouTube alias "KSI," is a British YouTuber and rapper. He is one of the co-founders of the popular YouTube group known as Sidemen. KSI has also collaborated with a number of other well-known YouTubers, including PewDiePie, Zoella, and Caspar Lee. KSI first gained prominence as a Call of Duty: Modern Warfare 3 commentator and live streamer on YouTube. He later transitioned into FIFA gameplay videos and vlogs. KSI's channel eventually became one of the most subscribed-to channels on YouTube, with over 19 million subscribers as of 2019. In addition to his YouTube career, KSI has also pursued a music career. He has released several singles and one album, titled "Dissimulation." KSI has also been involved in a number of high-profile feuds, most notably with fellow YouTuber PewDiePie. KSI was born on the 19th of June, 1993, in Watford, Hertfordshire, England. He has two younger sisters, Alicia and Emma. KSI's parents are of Nigerian descent. KSI was educated at Parmiter's School, a comprehensive school in Watford. He later attended the University of Manchester, where he studied business and marketing. KSI's YouTube career began in 2009 when he started posting commentary videos on the Call of Duty: Modern Warfare 3 multiplayer map "Terminal." KSI's channel eventually attracted a large following, and he began posting FIFA gameplay videos in 2011. In 2012, KSI collaborated with fellow YouTubers Zoella and Joe Sugg on a "FIFA 12" gameplay video. The video was a success, and KSI's channel began to grow rapidly in popularity. In 2013, KSI released his first diss track, "Lamborghini," aimed at fellow YouTuber PewDiePie. The two engaged in a public feud that lasted for several years. In 2015, KSI collaborated with singer Justin Bieber on the song "Where Are Ü Now." The song was a success, reaching the top 40 in several countries. In 2016, KSI founded the YouTube group known as Sidemen. The group consists of seven British YouTubers who produce FIFA gameplay videos and vlogs. In 2018, KSI released his debut album, "Dissimulation." The album peaked at number two on the UK Albums Chart. KSI has also been involved in a number of philanthropic endeavors. In 2014, he raised over $50,000 for the charity "Stand Up To Cancer." KSI is one of the most popular YouTubers in the world, with over 19 million subscribers as of 2019. He is also one of the highest-paid YouTubers, earning an estimated $4.5 million in 2018. KSI Live is coming to town and you don't want to miss it! Yadara has the best selection of KSI Live tickets at the cheapest prices. So what are you waiting for? Buy your KSI Live tickets today!