Hi there! I'd like to know the name of a song, in a dancing style, I think of the 70's, whose instrumental version has a piston or trumpet solo, with a female chorus humming "na, na, na, na ...". In the middle of the song has, for a while, a percussion in a style that reminds salsa. The sung version (by a set) has an arrangement similar to the instrumental, and the lyrics say, if I am not mistaken, "walking down".