LewisTV (formerly TheTadpole9) is a YouTube channel created by Alexandria Lewis.
On August 1st, 2011, an 8 year old Alexandria Lewis was introduced to her own YouTube channel by her father Scott Lewis. Her videos weren't really great, mostly plagiarism, but years later as she got older, she started to make better content.
Her videos were a series of The Mickey Mouse Show, Big Idea Fun with Lexie, Clockworks of Lexie, and Lexie's Kreative Kingdom.
Not only does she have a YouTube channel, she also has Newgrounds, Facebook, and Tumblr pages as well. (and the Wikia you're viewing right now)