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Aerosmith is an American hard rock band. One of their greatest hits is "Walk This Way".
Aerosmith performed at Moe's Tavern after Moe began serving the "Flaming Moe" drink (actually the "Flaming Homer," renamed by Moe). The drink proved to be a huge seller, turning the bar into an extremely popular hangout in Springfield. One evening, the Aerosmith members were in the bar, and Moe asked them to come on stage and play a song. Although they were initially reluctant, Moe managed to entice them with the promise of free pickled eggs. Aerosmith then played "Walk This Way" and turned the tables on a reluctant Moe by having him come on stage to help out with the singing.
Aerosmith returned for a second night, and performed without Joey Kramer, who was trapped in his trailer trying to stave off an amorous advance from Mrs. Krabappel, who had stolen his drumsticks.
Later, after business at Moe's returned to normal (due to Homer's having revealed the drink's secret ingredient), Homer was at Moe's and asked if he thought Aerosmith would be in that night, to which Moe replied, "I doubt it."
 Behind the Laughter
Aerosmith provided their own voices for their appearance on The Simpsons in the episode "Flaming Moe's".