After Bart cheats at the Springfield Marathon, he is recruited by record producer L.T Smash alongside Milhouse, Nelson, and Ralph Wiggum to form the Party Posse. However, when Lisa sees something strange in the band's new music video, she discovers a shocking conspiracy.
'''Tropes appearing in this episode''':
* YouAreTooLate: The Party Posse is unable to stop L.T from blowing up the [=MAD=] building.
* YouFool: L.T's response when his commander turns off the Party Posse's voice enhancers.