Who is 16-year-old Charli D'Amelio, the most-followed person on TikTok?

America's 16-year-old dancer Charli D'Amelio is the most-followed person on TikTok and recently hit 100 million followers. Before joining TikTok in mid-2019, she was a competitive dancer and posted videos and photos from competitions on Instagram. She became popular for her choreography and viral dances, appeared in a Super Bowl commercial, and will soon launch a book on her journey.