Season 33 of The Simpsons will kick off on Sept. 26 with the show's first-ever all-musical episode, titled The "The Star of the Backstage." Speaking at the virtual Comic-con, executive producer Matt Selman called it "the most musical episode we've ever done. Almost wall-to-wall music. It's like a Broadway musical of an episode with all original songs." Bell will be featured as Marge's singing voice. "We all love Marge's voice (Julie Kavner)," added Selman, "but this is the singing voice that's different, let's just say." As for the plot, Selman says: "Marge has amazing memories of being the stage manager of her high school musical, Y2K: The Millennium Bug, and decides to restage it with everyone 20 years later for one last show. But when her old high school nemesis comes to town, she realizes that her high school memories aren't what she thought they were."