America's 24-year-old Jimmy Donaldson, known as 'MrBeast', beat PewDiePie to become the world's most-followed individual on YouTube with over 111 million subscribers. He originally posted video game playthroughs and later made videos of expensive stunts, philanthropic gestures and giveaways like giving away hundreds of cars and a private island. He also runs his virtual restaurant MrBeast Burger.