@englishstudent Given that the prior line ended with you, that does seem to be the case. Similar abuses of the word do come to mind. A song by Roger Miller called
England Swings has such a line in the opening of its chorus "England swings like a pendulum do: bobbies on bicycles two by two". Alluding to other songs, and emulating nonstandard accents might also be reasons for abusing the word do in a song.