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 (Double Rainbow, Obama Fail, Twin Rabbits, Snickers Halloween). Her first appearance after graduating was in TEENS REACT TO TWILIGHT. Her first appearance on YouTubers React was in YouTubers React To News Bloopers 2013. Her sisters Emma and Sammie have also appeared on Kids React.