Marge says she imagines she sings like a Disney princess. In this episode Kristen Bell provides the singing voice for Marge. Bell voices Anna in Frozen (2013), thus a Disney princess (though unofficial).
The plot of reviving a high school musical is reminiscent of the Disney+ reality series "Encore," where each episode features a different high school musical cast reuniting after some odd years to perform a revival of their old show. The series is also hosted by Kristen Bell, who provides Marge's singing voice in this episode.
Strangely, Fox opted to air this Broadway musical-themed episode during the second hour of the 2021 Tony Awards.
Marge reminisces over her Y2K high school musical, back in 1999. Yet in the year 1999, Marge was a wife and mother, as the Simpsons had been a running show for 10 years by that point.
When she's exposing Sasha's lies, Marge resembles Elpheba, the witch from the Broadway musical 'Wicked,' a role originally played on Broadway by Idina Menzel, who voiced a character in Disney's 'Frozen' alongside Marge's singing voice for this episode, Kristen Bell.