[link to original on tumblr]
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At about 2:42 in the backing vocals, there's the line "Wish I was in the land of Dixie," and then the trumpets play almost all of the tune "Dixie," near the end of which some more lyrics (the overlapping "Look away"s) from "Dixie" appear. At about 3:30, those backing vocal parts ("Wish I was in the land of Dixie" and the overlapping "Look away"s) appear a second time.