Lia has appeared on Kids React, Teens React, and most recently YouTubers React. She was the first to "graduate" from Kids React and then again to YouTubers React. Her YouTube channel is LiaMarieJohnson. Her first appearance was in Kids React to Viral Videos #1 (Double Rainbow, Obama Fail, Twin Rabbits, Snickers Halloween). Her first appearance on Teens React was in TEENS REACT TO TWILIGHT. Her sisters Emma and Sammie have also appeased on Kids React.