MrBeast, whose name is Jimmy Donaldson, worked with ophthalmologists around the world to give sight to 1,000 people Tracey Harrington McCoy is a celebrity news writer at PEOPLE Digital.

How YouTube’s biggest star, Jimmy Donaldson aka MrBeast, grew from an 11-year-old kid YouTuber into a $5 billion business mogul with Beast Industries.(AP Photo / Rebecca Blackwell, File ...

Jimmy "MrBeast" Donaldson is at it again. The YouTuber, who is known for his elaborate stunts and cash giveaways, challenged willing participants to join his "Finger on the App" competition.