Instagram and YouTube star Essena O'Neill is ditching social media, saying that crafting an endless succession of staged, brand-sponsored photos led her to worry about her appearance, to feel like a commodity, and to lose track of what really matters in life. "I let myself be defined by numbers," O'Neill said in a YouTube video, which has since been taken down. "You'd think getting 100,000 followers on Instagram would be amazing. It was, for the day, but then you'd want 200,000."