 However , The Simpsons creator Matt Groening later stated during an appearance at the 1998 World Animation Celebration convention in Pasadena , California that " Do the Bartman " was actually co @-@ written and co @-@ produced by Jackson , but he could not receive credit for it because he was under contract to another record label . Groening told a crowd at the convention that had gathered for a " The Simpsons tribute " that it had " always [ been ] amazing to me that no one ever found out that Michael Jackson wrote that song . [ ... ] He was a big fan of the show . " 
