"Mary Had a Little Lamb" is an English language nursery rhyme of nineteenth-century American origin. It was heard in the Season Twelve episode, "Pandemic". The song is performed as an instrumental.


When Eric Cartman notices all the Peruvian Pan Flute Music bands making money at the local mall, he convinces Stan Marsh, Kenny McCormick, and Kyle Broflovski to form a band of their own. The boys con Craig Tucker into using his $100 birthday money so they can afford the costumes and instruments. The band are mistaken for real Peruvian street musicians and deported back to Peru with the other bands.