Matthew David Morris (born January 6, 2003), better known as MattyB or MattyBRaps, is an American children's artist, known for posting remix videos of popular music on YouTube. Morris has released numerous covers and remixes of mainstream music since he began his career in 2010. On August 1, 2014, MattyB's YouTube channel surpassed one billion views. On August 27, 2015, his debut EP premiered on YouTube, titled Outside the Lines. On June 7, 2016, Morris released a memoir book, That's a Rap, with the help of writer Travis Thrasher.