yeah i am also voting for songs that hasn't got into dvd yet. i didn't even voted Still... for couplings because they performed that already even tho i like that song a lot.
I think girls generally want shake it again because it involved the other members doing that shake it dance. Especially if you are not a jun lover, you probably just click the one they are most familiar with.
And newer fans usually/probably doesn't know the existence of naked....