Unless you’ve been living in a cave the past year, you’ve heard the story of Mark Zuckerburg, founder of Facebook. The world’s youngest billionaire, his company alone is valued at $100 billion. He joins 29 other young entrepreneurs on Under 30 CEO’s “Most Influentional” list.  Ranging from Tim O’Shaughnessy, the founder of online group buying site LivingSocial to Hayley Barna and  Katia Beauchamp who created BirchBox, a monthly subscription service that delivers beauty product samples to users on a monthly basis, this list is sure to inspire.

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