favourite backing vocals in instrumentals

[ayufan89]

i was listening to ayumi's instrumentals not too long ago and i just realised that most of the backing vocals are so cool and nice to listen to:

my fav:
-step you
-is this love. i think the backup vocals are sang in minor key
-daybreak hal's mix instrumental rocks so much, the vocals are sooo nice!
-alterna! esp after the chorus after the bridge

i dont really like the backing vocals for memorial address, i think it sounds weird and doesnt really complement the main tune. the vocals for evolution sounds weird too..

what's yours? =D