bit vague

[mechanised11]

this has been playing on my mind for ages, and will be a little vague in the description, but, the song i am looking for has the following section: it starts off with a woman singing (cant remember the lyrics at present) then it goes to a choir singing a sort of melody of "na na na, n'na na na na, n'na n'nana, na na" repeating that, i tried to get the "na's" as accurate as possible. cheers for any help.