LOS ANGELES — Fox's hit animated show "The Simpsons," which has used donut-loving Homer and his dysfunctional family to satirize US popular culture for 25 years, is celebrating another milestone with a plastic makeover featuring Lego building blocks. "Brick Like Me," airing on Sunday, marks the show's 550th episode and adds a notch in this year's revival of the popular Danish plastic building brick, after the runaway success of February's "The Lego Movie." "The Simpsons," created by Matt Groening and premiering in 1989, has rarely changed its basic visual form in a quarter century. It is the world's most-watched US television show, syndicated across more than 100 countries, and reaches more than 150 million viewers a week according to Fox. The show also has one of the largest TV Facebook fan pages with 72 million. — Reuters